Introduction to Lac and Lac Culture - Birsa Agricultural University
Introduction to Lac and Lac Culture - Birsa Agricultural University
Introduction to Lac and Lac Culture - Birsa Agricultural University
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<strong>Introduction</strong> <strong>to</strong><br />
Tech. Bull. FBTI : 01/2011<br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
1
IntroductIon<br />
<strong>to</strong><br />
LAc And LAc cuLturE<br />
dr. SAILESh chAt<strong>to</strong>pAdhyAy<br />
Department of forest Biology & tree improvement<br />
faculty of forestry<br />
<strong>Birsa</strong> <strong>Agricultural</strong> university, Kanke,<br />
ranchi-834 006 (Jharkh<strong>and</strong>)<br />
MAy, 2011
Forward<br />
T<br />
he compilation “<strong>Introduction</strong> <strong>to</strong> <strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> Cultivation” is<br />
praiseworthy & will serve as a reference for undergraduate<br />
students of Agriculture <strong>and</strong> Forestry Faculty.<br />
<strong>Lac</strong> is a unique commodity as it is probably the only known resin of<br />
animal origin. <strong>Lac</strong> insects settle closely on the twigs of Palas, Ber or<br />
Kusum, suck the plant sap <strong>and</strong> grow <strong>to</strong> form encrustations. <strong>Lac</strong> insects<br />
yield resin, lac dye <strong>and</strong> lac wax. Improvement in health <strong>and</strong> nutrition<br />
of host plants <strong>and</strong> scientific methods of rearing the insects is essential<br />
for sustained returns from lac cultivation. With increasing dem<strong>and</strong> of<br />
Aleuritic acid (a constituent of acid of shellac) in the world market as<br />
an ingredient of perfumes <strong>and</strong> pharmaceuticals, further studies on lac<br />
culture has become essential.<br />
I congratulate the author for his sincere efforts.<br />
Place : BAU, Ranchi<br />
Date : 01-05-2011<br />
A.K. Sarkar<br />
Dean (Agriculture)
Dr.A. Bhattacharya<br />
Principal, Scientist & Head<br />
Hkkjrh; izkÑfrd jky ,oa xksan laLFkku<br />
ukedqe] jk¡ph & 834010 ¼>kj[k.M½<br />
INDIAN INSTITUTE OF NATURAL AND GUMS<br />
(FORMERLy INDIAN LAc RESEARch INSTITUTE)<br />
NAMkUM, RANchI<br />
Message<br />
I<br />
have gone through the book entitled ‘introduction <strong>to</strong> <strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong>’ Writen by<br />
Dr. Sailesh Chat<strong>to</strong>padyay, Faculty of Forestry, <strong>Birsa</strong> Agriculture <strong>University</strong>, Ranchi. The<br />
book deals with basics of <strong>Lac</strong> <strong>Culture</strong> in simple language.<br />
I confirm that it would be a valuable <strong>and</strong> useful book for the students <strong>and</strong> scientists<br />
associated with <strong>Lac</strong> <strong>Culture</strong>.<br />
Phone: (91) 0651 - 2260117, 2261156 Fax :0651 - 2260202<br />
Email : lac@ilri.ernet.in<br />
Website: http://ilri.ernet.in www.icar.org.in/ilri/default.htm<br />
(A. Bhattacharya)
FAcULTy OF FORESTRy<br />
BIRSA AGRIcULTURAL UNIVERSITy<br />
Dr. S. Chat<strong>to</strong>padhyay<br />
Associate Professor<br />
Department of Forest Biology & Tree Improvement<br />
Acknowledgement<br />
<strong>Lac</strong> has been one of the important non-wood forest produce being utilized by the human society<br />
since time immemorial <strong>and</strong> lac farming provides subsidiary income <strong>to</strong> mainly poor subsistence<br />
level tribal farmers in the forest tracts of the country. The practices of lac culture are getting exp<strong>and</strong>ed<br />
in different regions of newly created Jharkh<strong>and</strong> state <strong>and</strong> necessity of a comprehensive account of<br />
<strong>Lac</strong> culture was strongly felt by all concerned. The present manual will be very useful for students,<br />
teachers <strong>and</strong> research workers concerned with lac culture.<br />
I express my appreciation <strong>to</strong> Dr. Bangali Baboo, ex-Direc<strong>to</strong>r, Indian Institute of Natural Resins <strong>and</strong> Gums<br />
(ICAR) <strong>and</strong> present National Direc<strong>to</strong>r (NAIP) at ICAR, New Delhi for his support, advice <strong>and</strong> helpful<br />
suggestions in writing the manual.<br />
I convey my regards <strong>to</strong> Dr. N. N. Singh, Hon’ble Vice Chancellor, <strong>Birsa</strong> <strong>Agricultural</strong> <strong>University</strong> for rendering<br />
his clarity of thought in the fruitful execution of the work.<br />
I wish <strong>to</strong> express my indebtness <strong>to</strong> Dr. A. K. Sarkar, Dean, Faculty of Agriculture, Dr. S. K. Singh, Dean,<br />
Faculty of Forestry, Dr. B.N.Singh, Direc<strong>to</strong>r Research, Dr. Balraj Singh, Dean P.G.s. -cum-D.R.I., <strong>and</strong><br />
Dr. S.M. S. Quli, Head Department of Forest Biology <strong>and</strong> Tree Improvement for their support <strong>and</strong><br />
encouragement in various ways for bringing out this publication.<br />
Sincere thanks are also due <strong>to</strong> Sri Amit <strong>and</strong> Sri Imtiaj for taking painful job of typing the manuscript.<br />
This publication has been made out of ICAR Development grant with whole hearted technical as well<br />
as moral support of Dr. A.K. Sarkar, Dean (Agriculture).<br />
(Sailesh Chat<strong>to</strong>padhyay)<br />
P.O. : Kanke, Ranchi - 834006, Jharkh<strong>and</strong> • Tele/Fax : 0651-2450835<br />
Email : saileshranchi@gmail.com<br />
Date : 01-05-2011
C O N T E N T S<br />
Page No.<br />
INTRODUCTION 01<br />
Why <strong>Lac</strong> Cultivation<br />
His<strong>to</strong>ry of lac <strong>and</strong> its organization<br />
WHAT IS LAC? 05<br />
Ari <strong>and</strong> Phunki <strong>Lac</strong><br />
<strong>Lac</strong> <strong>and</strong> its forms<br />
Composition of <strong>Lac</strong><br />
Properties of <strong>Lac</strong><br />
Uses of <strong>Lac</strong><br />
LAC HOSTS 08<br />
Area wise utilization of lac hosts<br />
Essential characteristics of lac hosts<br />
LAC PRODUCTION IN INDIA 10<br />
STRAINS OF LAC AND LAC CROPS 10<br />
LIFE HISTORY OF LAC INSECT 12<br />
LOCAL CULTIVATION PRACTICES OF LAC 14<br />
SCIENTIFIC METHOD OF LAC CULTIVATION 15<br />
Selection of suitable host plant<br />
Selection of suitable site for lac cultivation<br />
Coupe system<br />
Preparation of feeding ground for lac insect<br />
Pruning operation<br />
Objectives of pruning<br />
Types of pruning<br />
Pruning time<br />
Pruning instruments<br />
Collection of brood lac<br />
Selection of brood lac<br />
Inoculation of brood lac<br />
Punki removal<br />
Harvesting<br />
ENEMIES OF LAC INSECTS 21<br />
Vertebrate enemies<br />
Insect enemies<br />
Microbial flora<br />
LAC CULTIVATION VIS A VIS ENVIRONMENTAL<br />
ECONOMY CONSERVATION AND RURAL 26
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
<strong>Lac</strong> is a natural resinous substance of profound economic importance in India. It is the only resin<br />
from animal origin lending itself <strong>to</strong> diverse applications e.g. as a protective <strong>and</strong> decorative<br />
coating in the form of thin films, adhesives <strong>and</strong> plastics. It makes a small but significant contribution<br />
<strong>to</strong> the foreign exchange earning of the country, but the most important role that the lac plays in<br />
the economy of the country is that roughly 3-4 million tribal people, who constitute the socioeconomically<br />
weakest link of Indian population earn a subsidiary income from its cultivation. India<br />
is the major producer of lac, accounting for more than 50% of the <strong>to</strong>tal world production. It virtually<br />
held a monopoly in the lac trade during the period of the world war-I, producing nearly 90% of the<br />
world’s <strong>to</strong>tal output. Today an average of about 20 -22 thous<strong>and</strong> <strong>to</strong>ns of stick lac (raw lac) is produced<br />
in the country per year. Most of the lac produced in India is from homestead l<strong>and</strong> <strong>and</strong> wastel<strong>and</strong>.<br />
Usually host trees st<strong>and</strong>ing on rayyati l<strong>and</strong>s are used for lac cultivation <strong>and</strong> in some areas trees on<br />
Government l<strong>and</strong> are taken on lease or rental basis.<br />
Why <strong>Lac</strong> Cultivation ?<br />
A good source of livelihood resource for poor farmers.<br />
Assured source of income during drought years.<br />
Require meager inputs (like water, pesticides etc.)<br />
Most suitably grown on marginal <strong>and</strong> degraded l<strong>and</strong>.<br />
No competition with other horticultural, agricultural crops for l<strong>and</strong> <strong>and</strong> farm operation.<br />
Do not harm host tree health neither other flora <strong>and</strong> fauna.<br />
Avoids migration of rural population <strong>to</strong> urban areas.<br />
Increases opportunities for women for better occupation <strong>and</strong> returns.<br />
HISTORY OF LAC AND ITS ORGANIZATION :<br />
<strong>Lac</strong> has been known in India from time immemorial. The term “<strong>Lac</strong>” seems <strong>to</strong> have been derived from<br />
the Sanskrit word “Laksha” meaning a hundred thous<strong>and</strong> <strong>and</strong> is suggestive of the large number of<br />
insects involved in its production. The description of the insect <strong>and</strong> its host plant (Food plant) – Palas<br />
(Lakshataru) is recorded in the Atharva Veda. It is mentioned in the Mahabharata that Kauravas built<br />
the highly inflammable lakhagriha or Jadugriha (<strong>Lac</strong> house) with a motive of physically eliminating<br />
P<strong>and</strong>avas by setting the lac palace on fire. The Ain-i-Akbari of 16th Century records the use of pigmented<br />
lac varnishes for painting screens. The use of lac was known <strong>to</strong> ancient Greek <strong>and</strong> Romans also.<br />
Increasing dem<strong>and</strong> of lac products after World War-II has received attention in the present century.<br />
In order <strong>to</strong> increase the production of lac by scientific methods, an association named Indian <strong>Lac</strong><br />
Association (I.L.A) was formed in 1921, <strong>Lac</strong> Research Institute (L.R.I) was established at Namkum,<br />
Ranchi in 1924, with a view <strong>to</strong> have greater participation of the Government. In 1930, the Indian <strong>Lac</strong><br />
Cess Committee (I.L.C.C.) was formed <strong>and</strong> the committee <strong>to</strong>ok over the Indian <strong>Lac</strong> Research Institute<br />
(ILRI) in 1957. Then the need for a <strong>Lac</strong> Extension wing was felt <strong>and</strong> thereafter a <strong>Lac</strong> Extension Wing<br />
(L.E.W.) under the Indian <strong>Lac</strong> Cess Committee (I..L.C.C.) was created.<br />
1
2<br />
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
The Indian <strong>Lac</strong> Research Institute (I.L.R.I.) was taken over by the Indian Council of Agriculture Research<br />
(I.C.A.R.) in 1966.<br />
Responding <strong>to</strong> the opening up of economic policies, globalization of industries <strong>and</strong> agricultural<br />
enterprises, the Indian <strong>Lac</strong> Research Institute ( I.L.R.I. ) has undergone a structural change <strong>and</strong> its<br />
priorities have been redefined, widening the scope <strong>and</strong> m<strong>and</strong>ate of the institute. Besides research<br />
<strong>and</strong> development on all aspects of lac; processing <strong>and</strong> product development of other natural resins<br />
<strong>and</strong> gums have been brought under the ambit of research. Therefore, ILRI has been upgraded as<br />
Indian Institute of Natural Resins <strong>and</strong> Gums ( I.I.N.R.G. ) w.e.f. September 20, 2007.<br />
An Advisory body viz. the Indian <strong>Lac</strong> Development Council (I.L.D.C.) was also constituted by Govt. of<br />
India <strong>to</strong> give the due representation <strong>to</strong> the lac growing states <strong>and</strong> other interested in lac cultivation<br />
<strong>and</strong> its trade.<br />
The Direc<strong>to</strong>rate of <strong>Lac</strong> Development was transferred <strong>to</strong> the Ministry of Environment & Forests, in<br />
January, 1985. Later the Direc<strong>to</strong>rate of <strong>Lac</strong> Development was merged with Forest Research Institute<br />
(F.R.I.), Dehradun with effect from July, 1987 under the same ministry due <strong>to</strong> re-organization of<br />
subordinate <strong>and</strong> field officers of Ministry. Presently the Institute of Forest Productivity (Ex-Direc<strong>to</strong>rate<br />
of <strong>Lac</strong> Development), Ranchi is directly functioning under Indian Council of Forestry Research &<br />
Education (I.C.F.R.E.), Dehradun.<br />
The main functions of the Institute of Forest Productivity for <strong>Lac</strong> development are as follows :-<br />
1. To collect <strong>and</strong> compile various statistical data on lac concerning production, prices, internal<br />
consumption, export, dispatches etc. for use of government departments.<br />
2. To forecast <strong>and</strong> assess lac production in the country.<br />
3. To maintain regionally located Nucleus Brood <strong>Lac</strong> Farms for demonstration of improved<br />
methods of lac cultivation <strong>and</strong> supply of quality brood-lac <strong>to</strong> the villagers <strong>and</strong> user agencies.<br />
4. To maintain liaison between Central <strong>and</strong> State government, concerning lac development<br />
work.<br />
5. To render technical advice <strong>to</strong> the State government & other organizations on planning of lac<br />
cultivation, marketing, exports etc.<br />
6. To maintain an air-condition godown meant for s<strong>to</strong>ring shellac, seed lac etc. at Kolkata (West<br />
Bengal) which has been leased out <strong>to</strong> Central Warehousing Corporation<br />
INDIAN INSTITUTE OF NATURAL RESINS AND GUMS ( I.I.N.R.G. ):<br />
Indian Institute of Natural Resins <strong>and</strong> Gums (I.I.N.R.G.), formerly Indian <strong>Lac</strong> Research Institute (I. L. R.<br />
I.) located at Ranchi, Jharkh<strong>and</strong>, is a nodal Institute at national level for research <strong>and</strong> development<br />
on all aspects of natural resins, gums <strong>and</strong> gum-resins including LAC, such as production, processing,<br />
product development, training, information reposi<strong>to</strong>ry, technology dissemination <strong>and</strong> national /<br />
international cooperation.
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
Indian <strong>Lac</strong> Research Institute (I.L.R.I.) came in<strong>to</strong> existence as a result of the recommendation<br />
of a two member committee comprising of Mr. H.A.F. Lindsay <strong>and</strong> Mr C.M.Harlow appointed early in<br />
1920 by the then Govt of India <strong>to</strong> enquire in<strong>to</strong> the conditions of the Indian <strong>Lac</strong> trade <strong>and</strong> suggest<br />
measures for its all-round improvement. The report of the committee was published in 1921. They<br />
had recommended, besides other aspects, for intensive cultivation by significantly tested methods<br />
for sustained lac production. In view of this suggestion, the then lac merchants organized themselves<br />
in<strong>to</strong> a private registered body ,the Indian <strong>Lac</strong> Association for Research. The Association acquired l<strong>and</strong><br />
from the provincial government <strong>and</strong> the foundation of the Indian <strong>Lac</strong> Research Institute (I.L.R.I.)<br />
was laid on Sep.20, 1924. It started functioning under the Founder Direc<strong>to</strong>r, Mrs. Dorothy Norris.<br />
In 1930, on the recommendation of the Royal Commission for Agriculture, the Indian <strong>Lac</strong> Cess Act<br />
was passed by the Central Legislature. Under this Act, the Govt of India constituted the Indian <strong>Lac</strong><br />
Cess Committee which <strong>to</strong>ok over the Institute from <strong>Lac</strong> Association in 1931.<br />
After the Second World War, the First & Second Review Committees set up in 1951 <strong>and</strong> 1956, formed<br />
broad research programmes with equal emphasis on fundamental <strong>and</strong> applied research. During<br />
the period, four Regional Field Research Stations (R.F.R.S.) were set up at Jhalda (West Bengal),<br />
Damoh, Umaria (Madhya Pradesh) <strong>and</strong> Mirzapur (Uttar Pradesh) <strong>to</strong> take up regional problems. Later,<br />
Regional Testing Labora<strong>to</strong>ries were also established <strong>to</strong> support lac manufacturers for quality control<br />
of different types of lac manufactured by them. These were set up at Gondia (Maharashtra), Jhalda<br />
(West Bengal) in 1959, at Balrampur (West Bengal) <strong>and</strong> Dal<strong>to</strong>nganj (erstwhile Bihar) in 1961 <strong>and</strong> at<br />
Namkum, Ranchi (erstwhile Bihar) in 1962.<br />
Indian Council of <strong>Agricultural</strong> Research (I.C.A.R.) <strong>to</strong>ok over the administrative control of the Institute<br />
on 1st April,1966, with the abolition of the <strong>Lac</strong> Cess Committee on this day. The Institute was<br />
strengthened <strong>and</strong> reconstituted in December 1971, based on the recommendation of Sheshadri<br />
Committee, in<strong>to</strong> five devisions, viz. En<strong>to</strong>mology, Chemistry, Agronomy & Plant Genetics, Technology<br />
<strong>and</strong> Extension.<br />
Present status of IINRG for <strong>Lac</strong> development<br />
The IINRG has responded <strong>to</strong> the globalization of lac <strong>and</strong> lac-based industries <strong>and</strong> agricultural<br />
enterprises of the country as well as structural <strong>and</strong> functional reorganization of ICAR. The Institute<br />
also has undergone structural changes <strong>and</strong> the priorities have been redefined. The erstwhile divisions<br />
<strong>and</strong> sections have been abolished <strong>and</strong> the scientific manpower has now been divided in<strong>to</strong> three<br />
divisions. Viz. <strong>Lac</strong> Production, Processing <strong>and</strong> Product Development <strong>and</strong> Transfer of Technology.<br />
Since its inception, the Institute has played a significant role in creating awareness among the tribals<br />
about the benefit of scientific methods of lac cultivation. It has persistently endeavored <strong>to</strong> boost,<br />
optimize <strong>and</strong> disseminate appropriate technologies for Scientific methods of lac cultivation <strong>and</strong><br />
offers packages <strong>and</strong> practices for all major lac hosts. The Institute has been disseminating these<br />
technologies <strong>to</strong> the growers belonging <strong>to</strong> weaker sections, who cultivate lac in an area encompassing<br />
about 80,000 sq. km. covering the states of Jharkh<strong>and</strong>, West Bengal, U.P., M.P., Chhattisgarh, A.P.,<br />
3
4<br />
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
Maharashtra <strong>and</strong> Orissa. Presently the Institute has attained international recognition for its<br />
contribution in cultivation <strong>and</strong> utilization aspects of lac.<br />
MANDATE<br />
The m<strong>and</strong>ate of the Institute for <strong>Lac</strong> Development is :<br />
(i) To develop lac culture technologies, adopting existing or genetically improved lac insects <strong>and</strong><br />
lac hosts.<br />
(ii) To develop lac processing techniques for the industry.<br />
(iii) To conduct researches for diversification of lac utilization leading <strong>to</strong> pilot plant demonstration.<br />
(iv) To transfer the technologies <strong>to</strong> farmers <strong>and</strong> entrepreneurs.<br />
(v) To act as a reposi<strong>to</strong>ry of information on lac production, processing <strong>and</strong> utilization.
WHAT IS LAC?<br />
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
<strong>Lac</strong> is a natural, biodegradable, non-<strong>to</strong>xic, odourless, tasteless, hard resin <strong>and</strong> non-injurious <strong>to</strong> health.<br />
<strong>Lac</strong> is, in fact, a resinous protective secretion of tiny lac insect, Kerria lacca (Kerr.) which belongs<br />
<strong>to</strong> the family Tachardidae in the super family Coccoidea of the order Hemiptera. The lac insect is<br />
a pest on a number of plants both wild as well as cultivated. The tiny red–coloured larvae of lac<br />
insect settle on the young succulent shoots of the host plants in myriads <strong>and</strong> secrete a thick resinous<br />
fluid which covers their bodies. The secretion from the insects form a hard continuous encrustation<br />
over the twigs. The encrusted twigs are harvested <strong>and</strong> the encrusted twigs scraped off, dried <strong>and</strong><br />
processed <strong>to</strong> yield the lac of commerce which is regarded as Non Wood Forest Product (NWFP) of<br />
great economic importance <strong>to</strong> India.<br />
ARI LAC AND PHUNKI LAC:<br />
If lac crops are harvested by cutting down the lac bearing twigs a little before the larval emergence,<br />
that lac is known as ARI LAC ( immature lac ) or after the emergence is over, that is called PHUNKI LAC<br />
( empty lac ).<br />
LAC AND ITS FORMS<br />
Stick lac : The lac encrustations is separated by knife or broken off with finger from the<br />
twig of host plants <strong>and</strong> is known is STICK LAC or CRUDE LAC or RAW LAC.<br />
Seed lac : The stick lac, after grinding <strong>and</strong> washing, is called SEED LAC or CHOWRI.<br />
Shellac : The manufactured product prepared from stick lac after washing <strong>and</strong> melting,<br />
which takes the form of yellow coloured flakes, is called SHELLAC.<br />
But<strong>to</strong>n lac : After melting process, lac is dropped on a zinc sheet <strong>and</strong> allowed <strong>to</strong> spread<br />
out in<strong>to</strong> round discs of about 3” diameter <strong>and</strong> 1/4” thickness is called BUTTON<br />
LAC<br />
Garnet lac : It is prepared form inferior seed lac or kiri by the solvent extraction process. It is<br />
dark in colour <strong>and</strong> comparatively free from wax.<br />
Bleached<br />
lac<br />
: It is a refined product obtained by chemical treatment. It is prepared by<br />
dissolving shellac or seed lac in Sodium carbonate solution, bleaching the<br />
solution with Sodium hypochlorite <strong>and</strong> precipitating the resin with sulphuric<br />
acid. Bleached lac deteriorates quickly <strong>and</strong> should be used within 2-3 months<br />
of manufacture.<br />
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<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
Seed lac<br />
But<strong>to</strong>n lac<br />
Shellac<br />
Garnet lac<br />
COMPOSITION OF LAC<br />
The major constituents of stick lac or crude lac are resin, sugar, protein, soluble salt, coloring matter,<br />
wax, volatile oils, s<strong>and</strong>, woody matters <strong>and</strong> insect bodies. The resin is always associated with an<br />
odoriferous principle, a wax <strong>and</strong> a mixture of three dyes. Removal of both wax <strong>and</strong> dye results in a<br />
marvelous colourless <strong>and</strong> transparent resin having all the characteristic properties of the resin.<br />
Chemical analysis has revealed that the resin is made of at least six major chemical components of<br />
different molecular complexities.<br />
The building blocks of lac are mainly hydroxyaliphatic <strong>and</strong> sequiterpenic acids which are present in<br />
the proportion of 50:50. The basic blocks are however aleuritic <strong>and</strong> jalaric acids. The former is 9, 10,<br />
16 – trihydroxy palmitic acid <strong>and</strong> the later adihydroxymonocarboxylic sesquiterpenic acid having an<br />
aldehyde function.<br />
Composition of stick lac<br />
<strong>Lac</strong> resin - 68%<br />
<strong>Lac</strong> wax - 6%<br />
<strong>Lac</strong> dye - 1%<br />
Others - 25%
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
<strong>Lac</strong> resin : It is an ester complex of long chain hydroxy fatty acids <strong>and</strong><br />
sesquiterpenic acid.<br />
<strong>Lac</strong> dye : It is an anthraquinone derivative.<br />
<strong>Lac</strong> wax : It is the mixture of higher alcohol, esters, acids <strong>and</strong> hydrocarbons.<br />
Properties of lac<br />
The important properties of lac are as follows :<br />
(i) Soluble in alcohol <strong>and</strong> weak alkalis<br />
(ii) Capacity of forming uniform durable film.<br />
(iii) Possess high scratch hardness<br />
(iv) Resistance <strong>to</strong> water<br />
(v) Good adhesive nature<br />
(vi) Ability <strong>to</strong> form good sealers, undercoat primers.<br />
(vii) Capacity <strong>to</strong> allow quick rubbing with s<strong>and</strong>paper without slicking or gumming.<br />
No other single resin, both natural or synthetic, possess so many desirable properties <strong>and</strong> so lac is<br />
also termed as mULTIPURPOSE RESIN.<br />
Uses of lac:<br />
Because of its unique combination of properties, lac finds a wide variety of application in paint,<br />
electrical, au<strong>to</strong>mobile, cosmetic, adhesive, leather, wood finishing <strong>and</strong> other industries.<br />
Earlier about half of the <strong>to</strong>tal output was consumed in gramophone industry. <strong>Lac</strong> has long been in<br />
use both for decorative <strong>and</strong> lacquers of various kinds <strong>and</strong> insulating varnishes. It is usually used as a<br />
first coating on wood <strong>to</strong> fill the pores <strong>and</strong> also applied <strong>to</strong> seal knots likely <strong>to</strong> exude resin <strong>and</strong> disfigure<br />
or spoil finished paint work.<br />
<strong>Lac</strong> is used in manufacture of glazed paper, printing <strong>and</strong> water proofing inks, lac bangles, dry<br />
mounting tissue paper, dental plates <strong>and</strong> optical frames. It is also used as a coat for metal ware <strong>to</strong><br />
prevent tarnishing <strong>and</strong> for finishing various products such as playing cards, oil cloth <strong>and</strong> linoleum<br />
<strong>and</strong> for preserving archeological <strong>and</strong> zoological specimen.<br />
In electrical industry, lac is used as coating of insula<strong>to</strong>r, coating of spark plugs, cement of sockets of<br />
electrical lamp, antitracking insulating etc.<br />
In Pharmaceutical industry, lac is used in coating of tablets, micro-encapsulation of vitamins <strong>and</strong><br />
coating of medicines.<br />
<strong>Lac</strong> dye is used in dying of wool <strong>and</strong> silk, soft drink formulation, pill coating, confectionary <strong>and</strong><br />
chocolate coating.<br />
<strong>Lac</strong> wax has wide variety of uses in manufacturing shoe polishes, tailor’s chalk, lipstick, crayons (for<br />
writing in glass). Now a days it is also used in fruit coating.<br />
7
8<br />
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
LAC HOSTS<br />
The lac insects thrive on the sap of certain plants called lac hosts. So far, over four hundred species<br />
of plants have been recorded as hosts of which those are of importance from the commercial<br />
st<strong>and</strong> point are- Palas (Butea monosperma), Kusum (Schleichera oleosa), Ber (Zizyphus mauritiana).<br />
Other important lac host plants are Khair (Acacia catechu), Ghont (Zizyphus zylopyra), Barh (Ficus<br />
bengalensis), Peepal (Ficus religiosa), Arhar (Cajanus cajan), Galwang (Albizia lucida) etc.<br />
Palas Kusum Ber<br />
IMPORTANT LAC HOST PLANTS<br />
A bushy host plant species, Flemingia semialata Roxb. (Leguminaceae : Papilionacae), has been<br />
identified <strong>and</strong> field tested as a potential fast growing host for<br />
intensive lac cultivation during winter season lac crop of KUSmI STRAIN ( AGHANI) for increasing lac<br />
production <strong>to</strong> match with the growing global dem<strong>and</strong> of lac.<br />
Flemingia semialata (<strong>Lac</strong> host plant)
Area wise utilization of lac hosts are given below :-<br />
1. Palas<br />
(Butea monosperma)<br />
2. Kusum<br />
(Schleichera oleosa)<br />
3. Ber<br />
(Zizyphus mauritiana)<br />
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
It is commonest lac host through out the greater part of<br />
India, extending from North West Himalaya up <strong>to</strong> 900 m;<br />
in hills of South India up<strong>to</strong> 1200 m.<br />
Through out Central <strong>and</strong> South India, Jharkh<strong>and</strong>, Madhya<br />
Pradesh, Orissa <strong>and</strong> parts of Karnataka <strong>and</strong> Tamilnadu.<br />
Important lac host in Murshidabad <strong>and</strong> Malda districts<br />
of West Bengal <strong>and</strong> Hoshiarpur district of Punjab State,<br />
Jharkh<strong>and</strong> <strong>and</strong> Chhattisgarh<br />
4. Khair (Acacia catechu) Only Jharkh<strong>and</strong> State (Chotanagpur area)<br />
5. Ghont (Zizyphus zylopyra) Mainly cultivated in some parts of Northern Madhya<br />
Pradesh <strong>and</strong> Southern Uttar Pradesh<br />
6. Jallari (Shorea talura) It is the host plant in parts of Mysore & Chennai<br />
7. Galwang (Albizia lucida) It is an important lac host in Assam <strong>and</strong> has also given<br />
good results in Chotanagpur area in Jharkh<strong>and</strong>.<br />
8. Ficus spp. (F. religiosa,<br />
F. bengalensis, F. infec<strong>to</strong>ria)<br />
9. Arhar (Cajanus cajan)<br />
Grewia spp. (G. glabra & G.<br />
serruleta) Leea spp. (L. aspera, L.<br />
crispa & L. robusta), Ficus cunia<br />
10. moghania macrophylla<br />
Albizzia lucida<br />
Kydia calycina<br />
Ficus rumphii<br />
These are universal in occurrence <strong>and</strong> from which<br />
occasionally lac is collected here <strong>and</strong> there throughout<br />
India.<br />
Favoured host plants in Assam<br />
Common minor lac host plants of regional importance<br />
in Assam.<br />
Essential Characteristics of a lac host :<br />
The fac<strong>to</strong>r that determines whether the lac insect will flourish on a particular host species or not is<br />
the character of the sap of host plant. It is believed that the sap reactions of a good lac host should<br />
be near about neutral or slightly acidic (e.g. pH values between 5.8 <strong>and</strong> 6.0) <strong>and</strong> that the sap density<br />
of good lac host plants in lower than that on non-lac hosts. The sap reactions of non-lac hosts shows<br />
distinct acidity or alkalinity.<br />
9
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
10<br />
LAC PRODUCTION IN INDIA<br />
India <strong>and</strong> Thail<strong>and</strong> are the two major producers of lac. The main lac producing states in India are<br />
Chhattisgarh, Jharkh<strong>and</strong> , Madhya Pradesh, West Bengal, Uttar Pradesh, Orissa , Maharashtra <strong>and</strong><br />
Gujarat. The cultivation of lac is at present mainly confined <strong>to</strong> the conventional lac hosts trees of Palas<br />
, Ber <strong>and</strong> Kusum. At present <strong>to</strong>tal annual average production of stick lac in India is approximately<br />
20-22 thous<strong>and</strong> <strong>to</strong>ns which forms the raw material for lac industries. Chhattisgarh ranks 1st among<br />
the states followed by Jharkh<strong>and</strong> , Madhya Pradesh Maharashtra <strong>and</strong> West Bengal. These five states<br />
contribute around 95 % of the national lac production. .Nearly 75-80% of the finished product is<br />
exported <strong>and</strong> only a small portion nearly 20 <strong>to</strong> 25 % is consumed within the country.<br />
State wise list of the lac producing districts is given below :-<br />
Sl. No. State Districts<br />
1 Jharkh<strong>and</strong> : Palamau, Latehar, Garhwa, Ranchi, Lohardaga, Gumla, Simdega,<br />
Saraikela, Hazaribagh, Chatra, East Singhbhum & West Singhbhum<br />
2 West Bengal : Purulia, Bankura, Midnapur, Murshidabad & Malda<br />
3 Madhya Pradesh Balaghat, M<strong>and</strong>la, Hoshangabad, Shahdol, Jabalpur, Indore,<br />
Chhindwara, Rewa & Seoni.<br />
4 Chhattishgarh : Bilaspur, Raipur, Sarguja, Bastar, Rajn<strong>and</strong>gaon, Durg,,Kanker,<br />
Dhamtari, Korba & Raigarh.<br />
5 Maharashtra : Bh<strong>and</strong>ara, Ch<strong>and</strong>rapur, Gharchiroli, Gondia<br />
6 Orissa Mayurbhanj, Kendujargarh, Sundargarh, Kalah<strong>and</strong>i, Bolangir,<br />
Koraput, Sambalpur, Nabrangpur, Keonjhar, Balasore<br />
7 Gujarat : Vadodara, Panchmahal, Sabarkantha<br />
8 Uttar Pradesh : Mirzapur, Sonebhadra<br />
9 Bihar : Gaya<br />
10 Assam : Karbi Anglong, North Silchar Hill, Nagaon.<br />
11 Andhra Pradesh : Adilabad, Nizamabad<br />
12 Meghalaya : Khasi hills, Garo hills<br />
STRAINS OF LAC AND LAC CROPS<br />
Two strains of the lac insects are recognized in India, the RANGEENI AND KUSUMI. Each strain<br />
completes its life cycle twice a year but the seasons of maturity differ considerably. In Mysore, the<br />
RANGEENI strain completes their life cycle in 13 months on Jallari (Shorea talura).<br />
There are four lac crops in a year that are named after the Hindi months. The following table summaries<br />
the information about four lac crops.
Sl.<br />
No.<br />
Inoculation with<br />
<strong>Lac</strong> Swarming<br />
larva .<br />
Emergence<br />
of male<br />
insects<br />
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
Crop harvested Female insects<br />
mature <strong>and</strong> give rise<br />
<strong>to</strong> swarming larvae.<br />
1 2 3 4 5<br />
A. RANGEENI CROPS<br />
I Katki crop<br />
(June –July)<br />
II Baisakhi crop<br />
(Oct – Nov.)<br />
B. KUSUMI CROPS<br />
I. Aghani crop<br />
(June-July)<br />
II. Jethwi crop<br />
(Jan.-Feb.)<br />
Aug-Sept Oct-Nov Oct-Nov<br />
Feb-March April-May<br />
Leaving a certain amount<br />
of lac on trees <strong>to</strong> mature<br />
<strong>and</strong> act as brood in July<br />
June –July<br />
Sept. Dec.-Jan Jan.-Feb.<br />
March - April June –July June –July<br />
<strong>Lac</strong> is not always left on the trees until it matures fully, particularly in case of Baisakhi<br />
crop. When it is not mature, it (Baisakhi – ari) is cut, leaving a certain amount on the<br />
tree <strong>to</strong> act as brood for the next crop. In Rangeeni, three crops can be obtained from<br />
the host tree such as Jalari (Shorea talura) mostly found in Karnataka (Mysore region)<br />
<strong>and</strong> Rain tree (Samanea saman), mostly located in coastal region of West Bengal.<br />
These crops are commonly known as Trivoltine crop in which the lac insects pass<br />
through three life cycles in thirteen months.<br />
Crop Wise lac Production<br />
Regarding share of different crops, Katki-33.39%<br />
(rainy season crop of Rangeeni) contributed<br />
the most in national lac production followed<br />
respectively by baisakhi27.35% (summer season<br />
crop of rangeeni), jethwhi 19.50% (summer<br />
season crop of kusmi) <strong>and</strong> aghani19.42% (winter<br />
season crop of kusmi)<br />
LAC ENCRUSTATION<br />
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<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
12<br />
LIFE HISTORY OF LAC INSECT<br />
The lac insect ( Kerria lacca ) starts its life as a minute soft bodied nymphs, ovate in outline, slightly<br />
pointed posteriorly, nearly 0.6 mm. long excluding antennae <strong>and</strong> anal setae <strong>and</strong> about 0.25 mm<br />
across the thorax. It is crimson coloured, though yellow <strong>and</strong> white forms are also found in nature.<br />
LAC INSECT<br />
The nymphs emerge in large number at certain times of the year from the lac cells of the female insect<br />
depending on the strains <strong>and</strong> crop seasons, <strong>and</strong> crawl over the twigs <strong>and</strong> branches of the plants in<br />
search of suitable places for settlement. They settle very gregariously. A healthy female produces<br />
130 <strong>to</strong> 400 nymphs. The nymphal emergence from a female continues for a fortnight but from a twig<br />
comprising of many lac females, it continues for slightly more than 3 weeks <strong>and</strong> is controlled by the<br />
climatic conditions prevailing at that time. The lac nymphs usually emerge in greater number during<br />
8.0 <strong>to</strong> 12.0 hrs. They thrust their hair like proboscis up<strong>to</strong> phloem region <strong>to</strong> derive their nutrition. Once<br />
settled, the female never moves during its life time, while the male moves out only during the last<br />
phase of its life. The female insect then spends its entire life alone in the lac cell. The larval settlement<br />
is very dense at first often completely covering the lower surface of the twigs <strong>and</strong> sometimes<br />
extending <strong>to</strong> the upper surfaces as well. Density of settlement ranges from 150 <strong>to</strong> 180 sq. cm.<br />
A day or so after settlement, the nymph start secreting resin from the gl<strong>and</strong>s, distributed under the<br />
cuticle all over the body except near the mouth parts, the breathing pores <strong>and</strong> the vent. The nymphs<br />
thus get encased in cells of their own secretion, which increases in size with the increase in the size<br />
of the insect.<br />
The male <strong>and</strong> the female among the young larvae are not easily differentiated by the naked eye. In<br />
most cases, the females are preponderant, their population being about three times greater than<br />
that of the males. In some progenies the males may be in excess. After secretion of lac, the cell of the
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
male is elongated <strong>and</strong> shaped like a cigar, while that of the female is more or less oval is shape. The<br />
lac formed by the male is relatively small <strong>and</strong> therefore, the occasional preponderance of the males<br />
makes a poor crop.<br />
The insect moults three times before reaching maturity, the duration of each instar<br />
depending on the host species <strong>and</strong> the environmental fac<strong>to</strong>rs.<br />
After the first moult, both the female as well as male nymphs lose their legs, antennae<br />
<strong>and</strong> eyes. The male lac cells assume slipper like appearance <strong>and</strong> a loose operculum<br />
at the rear end is clearly seen after the second moult. During the last stage the male<br />
insects no longer feed as the mouth parts become atrophied.<br />
Subsequently after the second moult, the nymph pass through the prepupal <strong>and</strong><br />
pupal stage when appendages which ultimately develop in<strong>to</strong> legs, antennae, eyes <strong>and</strong><br />
wings ( except in apterous males) , aedeagus etc. are seen. The adult males, winged<br />
or wingless emerge with the hind end of the body first by pushing the operculum.<br />
Normally the winged males occur during the summer crops <strong>and</strong> the relative number<br />
of the two forms in a colony vary considerably in different seasons. A male has life of<br />
62-92 hrs. after emergence <strong>and</strong> copulate with the female which continues <strong>to</strong> remain<br />
enclosed in the lac cell. A male insect is capable of fertilizing 45 females.<br />
The female nymphs unlike the male, do not develop the organs cast off earlier after<br />
the first moult except the rudimentary antennae <strong>and</strong> the organs peculiar <strong>to</strong> the<br />
females become conspicuous. During the subsequent instars the female nymphs<br />
become swollen in form <strong>and</strong> loose all traces of segmentation. They assume form of a<br />
pear or roundish bag <strong>and</strong> completely occupy the space inside the lac cells. After the<br />
final <strong>and</strong> the third moult , the female is sexually mature <strong>and</strong> is fertilized by the male .<br />
<strong>Lac</strong> secretion by the females continue <strong>and</strong> the size of the insects as well as that of the<br />
enveloping lac cells increase at faster space. The female lac insects thus attain size,<br />
which is several times that of a male lac cell, <strong>and</strong> are therefore, the chief source of lac<br />
secretion. The females continue <strong>to</strong> secrete lac until eggs are laid. As the time of egg<br />
laying approaches, the female insects contract at one side, gradually vacating space<br />
inside the enveloping lac-cells. The powdery wax <strong>and</strong> wax filaments are secreted <strong>and</strong><br />
shed in the vacated space, possibly <strong>to</strong> provide dry dressing <strong>and</strong> cushion for the future<br />
young nymphs. The anal tubercle is gradually withdrawn inside the cells for laying<br />
eggs, which hatch in<strong>to</strong> nymphs immediately after laying.<br />
Egg laying ceases if the temperature falls below 17°c in summer <strong>and</strong> 15°c in winter.<br />
The lac nymphs inside the lac cells become inactive below the temperature of 20°c but<br />
their capacity <strong>to</strong> produce lac subsequently under favorable condition is not impaired.<br />
The bio-features of females in the progeny are not adversely affected by subjecting<br />
the brood lac ( lac encrustation on a twig containing gravid females) <strong>to</strong> temperature<br />
below 20 0 c for short period.<br />
13
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
14<br />
LOCAL CULTIVATION PRACTICES OF LAC<br />
The cultivation practices followed by the lac cultiva<strong>to</strong>rs are essentially the same<br />
throughout India except for slight deviation here <strong>and</strong> there <strong>to</strong> suit local conditions.<br />
It consists of taking repeated partial lac crop on the same tree after allowing a few<br />
shoots, carrying lac for self-inoculation every time or when the crop is harvested.<br />
Keeping the trees under continuous lac inoculation <strong>and</strong> heavy pruning of brunches<br />
repeatedly <strong>to</strong> collect lac crop, leads <strong>to</strong> general loss of vitality of the trees. Also the<br />
self inoculation of the trees lead <strong>to</strong> over-infection on the twigs <strong>and</strong> this quite often<br />
results in whole sale mortality of the crop in season of extreme summer. Besides,<br />
this helps multiplication of enemy insects of lac resulting in failure of crops, which<br />
ultimately forces the cultiva<strong>to</strong>r <strong>to</strong> ab<strong>and</strong>on cultivation on most of the lac host trees.<br />
In such seasons brood lac is not readily available for purchase <strong>and</strong> if at all, a very<br />
high price has <strong>to</strong> be paid which the cultiva<strong>to</strong>r cannot afford <strong>to</strong> pay. The cultiva<strong>to</strong>r<br />
usually purchases his brood <strong>to</strong> the extent he can afford at that time <strong>and</strong> puts it on a<br />
few trees <strong>and</strong> start cultivation cycle afresh. In favorable seasons, he reaps his crops<br />
<strong>and</strong> inoculates more of his trees <strong>and</strong> continues the self inoculation repeatedly till the<br />
crop fails again.<br />
Thus production is unsteady <strong>and</strong> usually a bumper crop is obtained in cycles of 3 <strong>to</strong><br />
4 years. Being a subsidiary crop, lac cultivation is carried on a casual manner <strong>and</strong> the<br />
cultiva<strong>to</strong>r is generally satisfied with what ever he gets.
SCIENTIFIC METHOD OF LAC CULTIVATION<br />
To start lac cultivation, two things are mainly <strong>to</strong> be taken in<strong>to</strong> consideration:<br />
(a) The suitable host plant on which the lac insect thrives.<br />
(b) Availability of healthy brood lac in time.<br />
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
Brood lac (in common parlance seed of other agricultural crops) is mature lac where from the<br />
young insects are ready <strong>to</strong> come out within the time specified. For getting the best result out<br />
of lac cultivation, the work should be planned on systematic basis. Such planning will aim at a<br />
sustained annual yield <strong>and</strong> also ensure that area under cultivation acquires self sufficiency of<br />
brood lac. Under systematic working, the host plants are cultivated <strong>and</strong> rested in turn in COUPE<br />
SYSTEm. The host trees should be properly pruned <strong>to</strong> put forth young succulent shoots before<br />
inoculation. Only enemy insect free brood lac should be used for inoculation. <strong>Lac</strong> crops being<br />
highly sensitive <strong>to</strong> climate vagaries, care has <strong>to</strong> be taken <strong>to</strong> provide optimum conditions for<br />
successful results.<br />
Selection of suitable host plants<br />
Selection of suitable host plants for lac cultivation is of paramount importance because quality <strong>and</strong><br />
yield of lac depend on this.<br />
Selected lac hosts should have the following salient features :<br />
(i) Fairly quick growing.<br />
(ii) Lower sap density.<br />
(iii) Well adapted <strong>to</strong> pollarding.<br />
Selection of suitable site for lac cultivation<br />
As lac can grow only in open areas, the sites for lac host plantation should be in such a place where<br />
free circulation of air around the host spp. is assured. Cultivation should not be attempted at places<br />
where fire susceptibility is there. When starting cultivation in new areas having lac host spp., it is<br />
always desirable <strong>to</strong> prune them before infection <strong>to</strong> ensure good lac production.<br />
COUPE SYSTEM: A SUSTAINED YIELD BASIS OF LAC CULTIVATION<br />
The coupe system has been developed for lac production on sustained yield basis. If the<br />
same tree is continuously inoculated, its vitality suffers <strong>and</strong> the yield of crop progressively<br />
diminishes. It is therefore, important that host plants are given periodic rest. The coupe system<br />
of cultivation provides for a maximum use of host plant resources consistent with their vigor<br />
<strong>and</strong> well being.<br />
In Rangeeni farms, two coupe system with equal number of palas (Butea monosperma) trees in two<br />
coupes having six (6) months rest is adopted for raising Baisakhi-cum-Katki crops in alternate seasons.<br />
The trees are inoculated with about 500g. of rangeeni brood lac per tree , in the month of Oct.-Nov.<br />
15
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
Harvesting is done after a year, after allowing self-inoculation in June-July by partial harvesting <strong>and</strong><br />
then harvesting the combined Baisaki-cum-Katki crop in next Oct. Nov.<br />
In the Kusumi farms, Kusum (Schleichera oleosa) is the major lac host plant species of Kusumi stain<br />
of lac insect. Five coupe system with equal number of trees in each coupe having 18 months rest in<br />
between pruning <strong>and</strong> inoculation is adopted. The trees are pruned 18 months prior <strong>to</strong> inoculation.<br />
Thereafter in the subsequent crops, harvesting will serve the purpose of pruning. The harvesting of<br />
crop is done after 6 months of inoculation.<br />
PREPARATION OF FEEDING GROUND FOR LAC INSECTS<br />
To get a good quality lac through cultivation, it is necessary <strong>to</strong> ensure proper type of feeding ground<br />
<strong>to</strong> the lac insects. The insects have <strong>to</strong> be provided with succulent shoots, as it can not drive its slender<br />
proboscis through thick bark. For getting a good number of requisite succulent shoots the most<br />
essential operation is pruning.<br />
Pruning Operation<br />
Pruning at proper time is one of the important operations where the branches/ twigs are cut in order<br />
<strong>to</strong> get the maximum numbers of succulent shoots <strong>to</strong> facilitate feeding of the lac insects. Improvised<br />
scientific method of pruning which is done in the brood lac farms is as follows:<br />
Pruning is done lightly, because light pruning avoids stunted growth <strong>and</strong> allows gradual increase in<br />
the frame of the tree. Branches more than 2.5 cm in diameter (more than thickness of one’s thumb)<br />
are not cut. Branches 1.25 cm or less in diameter are cut flush with a branch or trunk from where<br />
they arise. Branches between 1.25 cm <strong>to</strong> 2.5 cm in diameter are cut, so as <strong>to</strong> leave behind a stalk of<br />
about 30-45 cm in length. Dead <strong>and</strong> diseased branches are removed, split or broken branches are<br />
cut below the split.<br />
If trees are old <strong>and</strong> have lost their capacity <strong>to</strong> produce vigorous shoots of new flush, heavier pruning<br />
is carried out <strong>to</strong> produce the new wood at the expense of the old. Such operation will bring the tree<br />
<strong>to</strong> a better shape, so that subsequent pruning will give the desired flush. Proper pruning should<br />
result a good shape <strong>and</strong> give plenty of room for the development of new shoots.<br />
Objectives of Pruning<br />
To ensure new, good, healthy <strong>and</strong> succulent shoots.<br />
16<br />
To ensure availability of large number of shoots (larger area for lac insect settlement ).<br />
To provide rest <strong>to</strong> host plant for maintaining it vigour.<br />
To remove dead, diseased <strong>and</strong> broken branches.<br />
Types of pruning in lac host plants<br />
Two types of pruning/ coppicing have been recommended for lac culture.<br />
(i) Apical/ light pruning : Branches less than 2.5 cm diameter should be cut from base <strong>and</strong>
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
branches more that 2.5 cm diameter should be sharply cut leaving a stump of 30-45 cm from<br />
the base. Diseased <strong>and</strong> dead portion of branches should be removed completely. Light pruning<br />
is recommended for slow growing conventional tree host species like palas, kusum <strong>and</strong> ber.<br />
(ii) Basal / heavy pruning: Branches having less than 7 cm thickness should be removed from<br />
the base, whereas thicker branches should be cut at a place where it has a diameter of 7 cm. In<br />
quick growing bushy host, pruning should be done at a height of 10-15 cm from the ground<br />
level e.g. Flemingia macrophylla, F. semialata.<br />
Pruning time<br />
After several years of experimenting at Indian <strong>Lac</strong> Research Institute<br />
( presently I.I.N.R.G.), Ranchi, Jharkh<strong>and</strong>, it has been found that the best results are obtained by<br />
pruning in February for raising the Katki crop <strong>and</strong> in April for raising the Baisakhi crop in the case of<br />
major Rangeeni host, ber <strong>and</strong> palas. Pruning in these months will give shoots four <strong>and</strong> six months old<br />
respectively for the lac larvae <strong>to</strong> feed on.<br />
In case of kusum, pruning is best done in the month of June-July <strong>and</strong> January – February. These<br />
months coincide with those in which the crops mature <strong>and</strong> so harvesting of the mature crop<br />
serves the purpose of pruning also. Pruning time will, however need <strong>to</strong> be adjusted <strong>to</strong> suit local<br />
conditions.<br />
Under Chhotanagpur (Jharkh<strong>and</strong>) condition the following pruning times for different lac hosts have<br />
been found suitable for lac culture .<br />
Kusum (Schleichera oleosa) : Prunning should be done either in January / February or in June /<br />
July.<br />
Khair (Acacia catechu) : Pruning is <strong>to</strong> be done in March. However, harvesting of lac crop<br />
during February may be used <strong>to</strong> serve as pruning also.<br />
Ber (Zizyphus mauritiana) : Pruning should be done in February for inoculation in July <strong>and</strong> in<br />
April / May for inoculation in Oc<strong>to</strong>ber-November. For Kusmi lac crop,<br />
ber should be pruned 5 months before inoculation. However, recent<br />
observations have shown that harvesting of Aghani crop during<br />
February may also serve as pruning for inoculation in June – July.<br />
Palas (Butea monosperma) : Pruning should be done in February for lac inoculation in July <strong>and</strong><br />
April for inoculation in Oc<strong>to</strong>ber – November.<br />
Ficus spp. : Pruning is <strong>to</strong> be done in April for inoculation in July <strong>and</strong> in May for<br />
inoculation in Oc<strong>to</strong>ber.<br />
Pruning instruments<br />
Most of the lac cultiva<strong>to</strong>rs do pruning with axes. Proper pruning can not be done with the axe. If<br />
branches are cut with axe, they will either break or split. In both the cases damage <strong>to</strong> tree will be<br />
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<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
caused at cutting place in form of scraping of bark or splitting, giving opportunity for insect pest<br />
attack. The ideal pruning instruments are secateurs <strong>and</strong> long h<strong>and</strong>led tree prunners. Of these<br />
instruments, the most valuable are the long h<strong>and</strong>led tree prunners. There are two types of secateurs.<br />
These are Roll cut secateur <strong>and</strong> the French secateur. The former is better <strong>and</strong> easier <strong>to</strong> use but is easily<br />
damaged by careless h<strong>and</strong>ling<br />
Pruning is also done with pruning knife <strong>and</strong> Dauli. The use of pruning shear <strong>and</strong> pruning saw fitted in<br />
long h<strong>and</strong>le makes the operation easier as the pruning is done directly by st<strong>and</strong>ing on ground <strong>and</strong><br />
climbing is avoided.<br />
Collection of brood lac<br />
<strong>Lac</strong> sticks, having mature female insects ready <strong>to</strong> give rise <strong>to</strong> the next generation are<br />
called brood lac. As the female lac insect is capable of giving rise <strong>to</strong> a large number<br />
of larvae <strong>and</strong> <strong>to</strong> get the maximum benefit, it is essential that the brood should be cut<br />
at the proper time, so as <strong>to</strong> secure the emergence of the maximum possible number<br />
of larvae from it.<br />
18<br />
PREPARATION OF BROOD LAC BUNDLE<br />
For quality of brood lac, lac crops should be harvested only when mature. The cutting of brood lac<br />
should be taken up at the correct time keeping in view the swarming period i.e. the expected date of<br />
larval emergence. The ideal time of cutting would be that which will result in the swarming, starting<br />
immediately or within a couple of days of tying the brood on the host plant.<br />
Selection of brood lac<br />
After the brood lac has been cut from the plants, it is necessary <strong>to</strong> subject it <strong>to</strong> proper examination,<br />
so that only healthy lac with the minimum signs of preda<strong>to</strong>r <strong>and</strong> parasite damage is selected for use<br />
as brood lac. This is necessary <strong>to</strong> minimize the chances of propagation of the insect enemies of lac<br />
insects.<br />
Inoculation of brood lac<br />
This operation includes putting of bundles of brood lac (lac sticks containing gravid females) in the<br />
host twigs for allowing young lac larvae (crawlers) <strong>to</strong> come out of their mother cells <strong>and</strong> settle on the<br />
host plant.
INOCULATION OF BROOD LAC<br />
Following aspects should be taken in<strong>to</strong> consideration during inoculation operation:<br />
(i) Pest -free healthy brood lac should be used.<br />
(ii) Unwanted portions of the brood lac sticks should be removed.<br />
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
(iii) Bundles of brood lac (about 100 g. by weight) are <strong>to</strong> be prepared <strong>and</strong> put these bundles inside<br />
60 mesh nylon netting bags (approx. size 30 x 10 cm.). These will entrap all the preda<strong>to</strong>rs <strong>and</strong><br />
parasites but allow the lac larvae <strong>to</strong> come out.<br />
(iv) The brood lac bundles are tied on<strong>to</strong> the branches parallel <strong>to</strong> shoots .<br />
(v) One meter long brood lac is sufficient <strong>to</strong> inoculate 10-15 m. long shoots of equal length.<br />
(vi) During the period of inoculation, there are chances of brood bundles falling off <strong>and</strong> one<br />
should go round the inoculated trees in each branch <strong>and</strong> put such bundles back on the tree.<br />
(vii) Attempts should be made <strong>to</strong> see that the brood lac bundles are not kept on the tree for more<br />
that the minimum period required for complete inoculation. Ordinarily, this period will be<br />
two <strong>to</strong> three weeks. If the brood lac is kept even after the lac larvae have completely emerged,<br />
there is the danger of a larger number of enemy insects emerging from the empty (phunki)<br />
brood lac sticks <strong>and</strong> infestating the field heavily.<br />
Inoculation period in different lac crops<br />
Strain Crops Normal inoculation Period<br />
Rangeeni Baisakhi Oct. / Nov.<br />
Katki June / July<br />
Kusmi Ahgani June / July<br />
Jethwi Jan. / Feb.<br />
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<strong>Introduction</strong> <strong>to</strong><br />
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Phunki Removal<br />
The operation pertains <strong>to</strong> the removal of brood lac bundles used for inoculation purposes <strong>and</strong> the<br />
used up brood lac after complete emergence of lac larvae from female cells is called phunki removal.<br />
Ordinarily the emergence of lac larvae from the brood lac ceases after three weeks. The phunki lac so<br />
removed is scrapped off thereafter in the brood lac for more that three weeks from the start of larval<br />
emergence <strong>to</strong> avoid emergence of enemy insects. Phunki bundles are pulled down from the trees<br />
with the help of pole mounted Phunki hook or by climbing on trees.<br />
Harvesting<br />
This operation is done any time after the appearance of yellow spot which appears as a spot about<br />
a week prior <strong>to</strong> emergence of lac larvae. But in case of ari lac (immature) harvesting, the appearance<br />
of yellow spot is not considered. Yield of ari lac harvesting is about 25% less than mature crop<br />
harvesting. Harvested branches are collected <strong>and</strong> scrapped <strong>to</strong> get stick lac. Pruning instruments are<br />
used in harvesting. Secateur or long h<strong>and</strong>le tree prunners are better equipments for harvesting lac<br />
crop. If there is a surplus brood lac on the host, partial harvesting is done.<br />
20<br />
Period of harvesting<br />
Type of Harvesting Trees Period<br />
Partial harvesting Palas<br />
June / July<br />
Kusum Jan. / Feb or June / July<br />
Complete harvesting Palas Oct. / Nov.<br />
(Brood lac coupe tree)<br />
April / May<br />
(Ari coupe)<br />
REmARK :<br />
In summer (jethwi <strong>and</strong> baisakhi crops), complete harvesting is done one week before emergence of<br />
the larvae whereas in winter (aghani <strong>and</strong> katki crops) complete harvesting is done when emergence<br />
of larvae start.
ENEMIES OF LAC INSECTS<br />
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
There are many natural enemies of lac insects which include vertebrates, invertebrates (insect<br />
preda<strong>to</strong>rs <strong>and</strong> parasites) <strong>and</strong> microbial flora.<br />
Vertebrate enemies of lac insects<br />
The important vertebrate enemies are squirrels <strong>and</strong> rats <strong>and</strong> the damage caused by those enemies<br />
can be as serious as 50% of brood sticks in worst condition. Squirrels are active during the day time<br />
<strong>and</strong> the damage by them is more common under forest condition. Rats are active at night time <strong>and</strong><br />
the damage usually occurs near about the villages.<br />
Towards the crop maturity, these pests either gnaw the mature lac encrustation on the tree <strong>and</strong><br />
the brood lac tied <strong>to</strong> trees for inoculation <strong>and</strong> consume the full grown lac female insects with plenty<br />
of eggs inside them. The damage <strong>to</strong> brood lac tied <strong>to</strong> trees interferes with the inoculation, as the<br />
brood bundles <strong>and</strong> lac encrustations drop <strong>to</strong> the ground while the larval emergence is taking place.<br />
Besides squirrels <strong>and</strong> rats, monkeys also cause some damage <strong>to</strong> lac encrustations <strong>and</strong> <strong>to</strong> the newly<br />
developing shoots from pruned trees by breaking them.<br />
Control<br />
It is difficult <strong>to</strong> control the squirrels <strong>and</strong> rats under the open field conditions where lac is cultivated.<br />
However scaring away of these animals or poisoning them may be adopted <strong>to</strong> keep the rodents<br />
under attack.<br />
Insect enemies of <strong>Lac</strong> insect<br />
It has been estimated that on an average, up <strong>to</strong> 30-40% of the lac cells are destroyed by insect<br />
enemies of lac crop. At times, the enemy attack can be so serious as <strong>to</strong> result in crop failures.<br />
These are two kinds of enemy insects :<br />
(1) Parasites & (II) Preda<strong>to</strong>rs<br />
(i) Parasites : All parasites causing damage <strong>to</strong> lac insect belong <strong>to</strong> the Order Hymenoptera of<br />
class Insecta. A list of parasites associated with lac insect Kerria lacca) is presented below :<br />
Sl.No. Name of the parasite Family<br />
1. Anicetus dodonia - Encyrtidae<br />
2. Atropates hautefeuilli - Encyrtidae<br />
3. Aphras<strong>to</strong>bracon flavipennis - Encyrtidae<br />
4. Bracon greeni - Encyrtidae<br />
5. Campyloneurus indicus - Encyrtidae<br />
6. Coccophaqus tchirchii Aphelinidae<br />
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<strong>Introduction</strong> <strong>to</strong><br />
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Sl.No. Name of the parasite Family<br />
22<br />
7. Erencyrtus dewitzi Encyrtidae<br />
8. Eupelmus tachardiae Eupelmidae<br />
9. Eurymyiocnema aphelinoides Aphelinidae<br />
10. Lyka lacca Encyrtidae<br />
11. marietta javensis Aphelinidae<br />
12. Parageniaspis indicus Encyrtidae<br />
13. Parechthrodryinus clavicornis Encyrtidae<br />
14. Protyndarichus submettalicus Encyrtidae<br />
15. Tachardiaephagus tachardiae Encyrtidae<br />
16. Teachardiobius nigricans Encyrtidae<br />
17. Apros<strong>to</strong>cetus(Tetrastichus) purpureus Eulophidae<br />
Among the parasites listed above Tachardiaephagus tachardiae <strong>and</strong> Tetrastichus purpureus are the<br />
most abundant lac associated parasites. They lay their eggs in the lac cells <strong>and</strong> the grubs (larvae)<br />
hatching out feed on the lac insect within its cell.<br />
(II) Preda<strong>to</strong>rs :<br />
The preda<strong>to</strong>rs on the other h<strong>and</strong>, are more serious <strong>and</strong> may cause damage up <strong>to</strong> 30-35 percent <strong>to</strong><br />
the cells in a crop.<br />
The list of preda<strong>to</strong>rs of lac insects are given below:<br />
Sl. No. Insect Preda<strong>to</strong>r Order Family<br />
1. Eublemma amabilis Lepidoptera Noctuidae<br />
2. E. coccidiphaga ,, ,,<br />
3. E. cretacea ,, ,,<br />
4. E. scitula ,, ,,<br />
5. Pseudohypa<strong>to</strong>pa pulverea ,, Blas<strong>to</strong>basidae<br />
6. Catablemma sumbavensis ,, ,,<br />
7. Cryp<strong>to</strong>blabes ephestialis ,, ,,
Sl. No. Insect Preda<strong>to</strong>r Order Family<br />
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
8. Phroderces falcatella ,, Cosmopterygidae<br />
9. <strong>Lac</strong>ciferophaga yunnanea ,, Momphidae<br />
10. Chrysopa madestes Neuroptera Chrysopidae<br />
11. C. lacciperda ,, ,,<br />
12. Berginus maindroni Coleoptera Myce<strong>to</strong>phagidae<br />
13. Silvanus iyeri ,, Cucujidae<br />
14. Tribolium ferrugineum ,, Tenebrionidae<br />
15. Phyllodromia humbertiana Dictyoptera Blattellidae<br />
16. Ischonoptera fulvastrata ,, ,,<br />
Eublemma amabilis <strong>and</strong> Pseudohypa<strong>to</strong>pa pulverea are the most destructive key pests of lac insects<br />
<strong>and</strong> are in regular occurrence but their incidence may vary from season <strong>to</strong> season, place <strong>to</strong> place <strong>and</strong><br />
crop <strong>to</strong> crop.<br />
(i) Eublemma amabilis :<br />
It is the most destructive preda<strong>to</strong>r of lac insect <strong>and</strong> causes most damage during katki <strong>and</strong> aghani lac<br />
crops i.e. during the rainy season in comparison <strong>to</strong> the other two crops.<br />
Life his<strong>to</strong>ry :<br />
A single female moth lays greyish, flat <strong>and</strong> rounded eggs singly on the test of lac insect. The newly<br />
hatched larvae, 0.51 <strong>to</strong> 0.54 mm long, get at the lac insect either through the opening of the test or<br />
by tunneling a hole through encrustation. A single larva can destroy 40-60 lac insect cells in its whole<br />
larval period. It has six generations in a year <strong>and</strong> the duration of the generations are about 37, 45,<br />
42, 125, 80 <strong>and</strong> 40 days respectively. Attacked lac cells can easily be identified because of its pinkish<br />
colouration due <strong>to</strong> presence of pink coloured discs of excreta inside the hollow lac cells.<br />
(ii) Pseudohypa<strong>to</strong>pa pulverea :<br />
It is also destructive preda<strong>to</strong>r of lac insects <strong>and</strong> found in all lac growing areas of the country. It feeds<br />
on the live <strong>and</strong> dead lac insects <strong>and</strong> is found in large numbers in s<strong>to</strong>red lac <strong>and</strong> so it is responsible for<br />
the qualitative <strong>and</strong> quantitative deterioration of s<strong>to</strong>red lac.<br />
Life his<strong>to</strong>ry<br />
It lays oval (0.5 mm X 0.3 mm), colourless eggs, singly on the test of lac insects. Larvae pass normally<br />
through 5 instars but the hibernating larvae have nine instars. The newly hatched larva is about 1.35<br />
23
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
mm long whereas a mature larva is 10 - 12 mm in length <strong>and</strong> 2 mm in breadth. Larval<br />
stages feed on the lac larvae <strong>and</strong> spins a loose web. A single larval preda<strong>to</strong>r is capable of destroying<br />
45-60 mature lac cells.<br />
24<br />
PREVENTION AND CONTROL OF INSECT ENEMIES<br />
Preventive measures :<br />
(i) Parasite <strong>and</strong> preda<strong>to</strong>r free brood lac should be used for inoculation.<br />
(ii) Self inoculation of lac crops should be avoided as far as possible.<br />
(iii) Inoculated brood bundles should be kept on the host tree for a minimum period<br />
only.<br />
(iv) Phunki (empty brood lac sticks) should be removed from the inoculated trees in 2 – 3 weeks<br />
time.<br />
(v) All lac cut from the tree <strong>and</strong> all phunki brood lac (after use as brood lac) not<br />
required for brood purpose should be scraped or fumigated at once.<br />
(vi) Cultivation of Kusmi strain of lac should be avoided in predominantly rangeeni area <strong>and</strong> viceversa.<br />
Mechanical control :<br />
Use of 60 mesh synthetic netting (brood bag) <strong>to</strong> enclose brood lac for inoculation purposes can<br />
reduce infestation of enemy insects of lac. The emerging lac larvae easily crawl out from the minute<br />
pores of the net <strong>and</strong> settle on the twigs of the lac host plants, whereas the emerging adult preda<strong>to</strong>r<br />
enemies can not move out of the brood bags <strong>and</strong> get entrapped within the net. This can check the<br />
egg laying by the preda<strong>to</strong>r moths on the new crop.<br />
Chemical control :<br />
Application of 0.05% endosulfan at 30-35 days stage of crop has been identified as the most effective<br />
dose of insecticide without any adverse effect on the economic attributes of the lac insect.<br />
Microbial control :<br />
Use of bio- pesticide, Thuricide (Bacillus thuringiensis) at 30-35 days stage of crop is the effective<br />
microbial control measure for important enemy insects of lac in field condition.<br />
Biological control :<br />
Two ant preda<strong>to</strong>rs viz. Camponotus compresus <strong>and</strong> solenopsis geminate rufa are the most important<br />
<strong>and</strong> promising for biological control of preda<strong>to</strong>r enemies of lac in field condition.<br />
Egg parasi<strong>to</strong>ids viz. Trichogramma pretiosum, T. chilonis, T. poliae, Trichogramma<strong>to</strong>idea bactrae <strong>and</strong><br />
Telenomus remus have been found <strong>to</strong> be effective in management of lac preda<strong>to</strong>rs.
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
Microbial flora associated with lac insects:<br />
Two types of microflora viz. bacteria <strong>and</strong> fungi are associated with the lac insects. Bacteria act through<br />
lac hosts <strong>and</strong> could be symbiotic or pathogenic where as effect of fungi is direct either as symbiotic<br />
or as an adversary. Microbial studies conducted have revealed that four species of micro-organisms<br />
viz. micrococcus varians, m. conglomerates, Clostridium sp. <strong>and</strong> Bacillus subtilis are found is permanent<br />
association with various stages of lac insects. Presence of various symbiotic microflora is considered<br />
beneficial for good yield of lac particularly during rainy season crop. Association of fungi with lac<br />
insect is not always beneficial.<br />
Besides insect enemies, lac crop yield suffers significant loss due <strong>to</strong> other biotic agents particularly<br />
fungi. Fungal infection in lac culture causes severe losses of lac yield by:<br />
(i) Killing the lac insects by inhibiting respiration.<br />
(ii) Hindering mating process.<br />
(iii) Blocking larval emergence<br />
(iv) Affecting lac host efficiency.<br />
<strong>Lac</strong> culture during rainy season is prone <strong>to</strong> fungal attack particularly when grown on Ber (Ziziphus<br />
mauritiana), Kusum (Schleichera oleosa) due <strong>to</strong> their steady <strong>and</strong> spreading crown. Three species<br />
of fungi belonging <strong>to</strong> family Eurotiaceae <strong>and</strong> Aspergillaceae viz. Aspergillus awamori, Aspergillus<br />
terricola <strong>and</strong> Penicillium citrinum are reported <strong>to</strong> cause maximum loss in lac crop. Aspergillus awamori<br />
<strong>and</strong> Penicillium citrinum are black <strong>and</strong> greenish in colour respectively were observed <strong>to</strong> make a<br />
continuous cover on lac insect culture <strong>and</strong> thereby blocking their breathing pores <strong>and</strong> ultimately<br />
leading <strong>to</strong> mortality of lac insects. A pathogenic fungus, Pythium sp. in female tests, causes a heavy<br />
mortality on the larvae which fail <strong>to</strong> enclose satisfac<strong>to</strong>rily <strong>and</strong> lie dead in clusters within the female<br />
resinous cell.<br />
Prevention <strong>and</strong> control :<br />
Application of fungicides, Bavistin (carbendazim 0.05%) <strong>and</strong> Dithane M-45 (mancozeb, 0.18%) by<br />
both dipping of brood lac before inoculation <strong>and</strong> spraying on st<strong>and</strong>ing crop gives significantly better<br />
yield of lac. Significant reduction (75% <strong>to</strong> 84%) in mortality of 2nd inster lac nymphs/ larvae can be<br />
done by the application of different concentration of carbendazim <strong>and</strong> aureofungin on kusmi stain<br />
of lac insect.<br />
25
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
26<br />
LAC CULTIVATION VIS A VIS ENVIRONMENTAL CONSERVATION<br />
AND RURAL ECONOMY<br />
<strong>Lac</strong> cultivation is simple, free from high technology <strong>and</strong> does not need large investment . It<br />
requires only part time attention of cultiva<strong>to</strong>rs thus eminently suited <strong>to</strong> the tribal/rural people<br />
living in the vicinity of natural <strong>and</strong> man-made forests. Sustained attention on the lac cultivation<br />
will lead <strong>to</strong> the sustained production <strong>and</strong> steady returns can be achieved by adopting improved<br />
methods of cultivation. <strong>Lac</strong> insects are cultured on such host trees which are capable of growing<br />
in wastel<strong>and</strong>s.<br />
<strong>Lac</strong> culture offers viable entrepreneurial opportunities <strong>and</strong> is no doubt uniquely suited <strong>to</strong><br />
the economy <strong>and</strong> social structure of developing countries like India. It paves the way for rural<br />
employment <strong>and</strong> rural development. <strong>Lac</strong> insects depend on the various forest species viz. Palas,<br />
Kusum, Ber, Babul, Khair etc . Failure of protection mechanism <strong>and</strong> uncontrolled illicit cutting<br />
has resulted in degradation in forest as well as the lac host plants. <strong>Lac</strong> culture can arrest forest<br />
destruction <strong>and</strong> permit gainful utilization of vast natural wealth. For the conservation of lac host<br />
plants, lac host jungle with active involvement of forest dwellers / tribals would save our natural<br />
environment <strong>and</strong> bring out eco-friendly relation between plants <strong>and</strong> animals.<br />
In the recent past, there has been considerable degradation in the environment mainly due<br />
<strong>to</strong> the fac<strong>to</strong>rs responsible for improvement in the quality of human life. The ecosystem of the<br />
country is in precarious state. We have been consistently losing the forest <strong>and</strong> consequently<br />
the forest resource are dwindled. The alarming resource degradation can be combated only by<br />
creation of man made forests on an adequate scale while simultaneously providing protection<br />
<strong>to</strong> our natural forests. Every tree raised on any l<strong>and</strong> provide both protective <strong>and</strong> productive<br />
functions. In India, the <strong>to</strong>tal wastel<strong>and</strong>s in non-forest area are estimated <strong>to</strong> be 93.70 million ha in<br />
which suitable programme <strong>to</strong> check any further deforestation <strong>and</strong> deterioration of environment.<br />
It is in this context, lac cultivation is of paramount importance in India. Promotion of lac<br />
cultivation on natural <strong>and</strong> man made forests will not only help on ecosystem development but<br />
also act as attractive alternative for economic returns of forest dwellers. The economy of people<br />
living in <strong>and</strong> around the forest is very much dependent upon the forests for self consumption<br />
of forest products <strong>and</strong> income generation by their sale. Dependence on forest products is<br />
particularly high in villages which have not undergone agricultural development. Local people<br />
depending on the forest products for their subsistence should be trained in the cultivation of lac<br />
using scientific methods. A conservation package including protection of lac host plants, their
<strong>Introduction</strong> <strong>to</strong><br />
<strong>Lac</strong> <strong>and</strong> <strong>Lac</strong> <strong>Culture</strong><br />
management <strong>and</strong> propagation for the purpose of lac cultivation should be evolved for each<br />
region <strong>to</strong> ensure viable income <strong>to</strong> rural people. The National Forest Policy (1988) has given due<br />
importance <strong>to</strong> people’s participation in creation <strong>and</strong> conservation of resources. Participa<strong>to</strong>ry<br />
Forest Management is the new concept for regenerating the degraded forest. The Government<br />
should aim at the programmes leading <strong>to</strong> the socio-economic development of forest dwellers<br />
<strong>to</strong> bring down their level of dependence on forests. <strong>Lac</strong> cultivation is a programme eminently<br />
suited for the purpose in which income is generated without destruction of the forest. Further it<br />
is helpful <strong>to</strong> enrich the lac jungle.<br />
Conservation of lac jungles is of vital importance because it is not only helps <strong>to</strong> enrich the forests<br />
but also contribute in the direction of achieving the national target of 33.3 % of the forest. The<br />
conservation of these forests help <strong>to</strong> supply the basic needs of tribals on sustained basis which helps<br />
<strong>to</strong> alleviate their poverty. Tribals / rural people enjoying the benefits of lac culture should be trained in<br />
the scientific methods of cultivation. Indiscriminate <strong>and</strong> unscientific exploitation should be avoided.<br />
The successful implementation of participa<strong>to</strong>ry forest management programme in lac cultivation is<br />
likely <strong>to</strong> ensure the twin objectives of conservation <strong>and</strong> meeting the needs of the rural people.<br />
LITERATURE CONSULTED<br />
Anon. (1972). Indian Forest Utilization. FRI Publ. Govt. of India, Vol. II 941 pp.<br />
Anon. (1980). Silviculture of Indian trees. FRI Publ., Govt of India. Vol III<br />
Anon. (1999 – 2000). Annual <strong>Lac</strong> Bulletin. IFE (ICFRE), Ranchi.<br />
Anon. (2001). State of Forest Report, Forest Survey of India, Govt. of India.<br />
Anon. (2005). State of Forest Report, Forest Survey of India, Govt. of India.<br />
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