Lac INSECT and it's morphology

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1. Lac insects & It’s morphology

2. Hello! I am SUMIT ACHARYA
My roll no is 180804130073 2

3. What is Lac?

4. • Lac is the scarlet red resinous secretion of a number of species of lac insects, of which the most commonly cultivated species is Kerria lacca. • It is only known commercial resin of animal origin. • Lac produced is a mixture of resin, dye and wax. 4

5. Rearing of lac insects for commercial production of the lac is called as lac culture. Cultivation of Lac not only provide livelihood to millions of Lac growers, but also helps in conserving vast stretches of forest and biodiversity associated with lac insect complex. 5

6. TAXONOMY Lac insect : Laccifera lacca Order : Hemiptera Sub order : Sternorrhyncha Super family : Coccoidae Family : Kerridae Genus : Laccifera Species : lacca

7. DISTRIBUTION India , Pakisthan , Sri Lanka , Myamar , Malaysia , China , Thialand 7

8. MORPHOLOGY Lac insect is a hemimetabolous i.e. it undergoes gradual metamorphosis. It has three life stage namely egg, young one and adult. The young ones are called as nymph. The nymphs are similar to adult in all aspects except their size and reproductive organs. The adult male and female are different from each other. Female is about three time larger than the male. 8

9. 9 Male These are pinkish red in colour and may be winged or wing less. Winged male possesses only one pair of translucent membranous forewing. They are mostly found during dry season (Baisakhi and Jethwai). They survive for 3 to 4 days only and die after coupulation. Some of the important characteristics are i. Head is large, prominent mouthparts but vestigial ii. Ocelli are two pairs with seven segmented antennae which have hair on them. iii. Tarsi 3 segmented. iv. The abdomen is 8 segmented, broader anteriorly and narrower posteriorly. v. The last abdominal segment bear pointed penis.

10. Female : The female is pinkish in colour. The ventral surface of body is flat while dorsal surface is convex. Some of the important characteristics are i. The female have degenerated eye, legs and wings. Ii. Antennae are vestigial, small and 3 to 4 segmented. Iii. Mouthparts are piercing and sucking type, rostrum is two segmented. Iv. Mesothorax is provided with an appendage on which spiracles open. V. The abdomen is round and on the dorsal surface, a spine is provided. 10

11. Thank you 11