Lecture 8 Insect ecology and balance of life Ecology: The term ecology is derived from the Greek term “oikos” meaning “house” combined with “logy” meaning “the science of” or “the study of”. [Show full abstract] be most susceptible plant species with a maximum 24.16% plant infestation. Girls P.G. Studies on the lac insect, Kerria lacca Kerr. It involves proper care of host plants, regular pruning of host plants, propagation, collection and processing of lac. It is commercially More number of species: In the animal kingdom more than 85 per cent of the species belongs to insect group. Elimination of Lac insects also leads to simultaneous erosion of the accompanying other flora and fauna. Species — lacca . Research has shown that elimination of a single species of Lac insects has led to destruction of many other interrelated species of flora and fauna. Lac insects thrive on more than 400 plant species generally growing in the forests which have varied economic, medicinal and social significance. The agro climatic conditions are very conducive for growth and development of the insect. Field crops and horticultural crops are attacked by many insect species. Lac is produced by an insect Laccifer lacca. The females are globular in form and live on twigs in cells of resin created by exudations of lac. See our User Agreement and Privacy Policy. (Delphacidae: Homoptera) Distribution: Distributed throughout South and South East Asia where rice is grown. It is known only to feed on rice and the weed Leersia hexandra Sw., Poaceae. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. This involves selection and maintenance of host plants, inoculation of host plants with healthy lac insects, collection and processing of lac and protection against enemies. MORPHOLOGY. You can change your ad preferences anytime. Title: Insects Author: Vicki Peplin Last modified by: MAROONVICTORIA Created Date: 4/4/2006 1:20:26 AM Document presentation format: On-screen Show (4:3) – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 7601ee-OTg2N Field crops and horticultural crops are attacked by many insect species. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Clipping is a handy way to collect important slides you want to go back to later. Destruction of host trees like Ber has been detrimental to the survival of Lac insects. It is the only resin of animal origin, being actually the secretion of a tiny scale insect, Kerria lacca Kerr (belongs to the family 1. You can change your ad preferences anytime. They live inside the chambers in the tree twigs. 4. in India two strains of lac insect occur, namely, the Rangini and the Kusmi.. Kerria lacca is a species of insect in the family Kerriidae, the lac insects.These are in the superfamily Coccoidea, the scale insects.This species is perhaps the most commercially important lac insect, being a main source of lac, a resin which can be refined into shellac and other products. The lobate lac scale, Paratachardina pseudolobata Kondo & Gullan (Hemiptera: Sternorrhyncha: Coccoidea: Kerriidae), was found for the first time in Florida on a hibiscus (Hibiscus rosa-sinensis) in the town of Davie (Broward County) in August 1999 by personnel of the Florida Department of Agriculture and Consumer Services, Division of Plant Industry (DPI) (Hamon 2001). The insect produce three products namely resin, dye and wax of great commercial importance. Uses of Lac 6. India held virtual monopoly of lac until 1950 and accounted for about 85% of the world’s production of sticklac. (eg) cotton bollworm, Rice stem bores. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. See our Privacy Policy and User Agreement for details. It measures 4-5 mm in length. Dr. Dinesh C. Sharma, Now customize the name of a clipboard to store your clips. Brown plant hopper Nilaparvata lugens (Stal.) It is found in tropical or subtropical regions on banyan and other plants. If you continue browsing the site, you agree to the use of cookies on this website. A. Injurious insects a) Pests of cultivated plants (Crop pests) Each cultivated plant harbors many insects pests which feed on them reduce the yield of the3 crop. Sex-ratio in relation to moisture and the species of lac insect. It is secreted by an insect, known as lac-insect In order to obtain lac, these insects are cultured and the technique is called lac-culture. Insects feed on stored products and cause economic loss. b) Storage pests . Of these 19 species, only K. lacca is exploited for commercial production of lac. Serious plant pests are the San Jose scale, the oystershell scale, the scurfy scale, and the purple and red scale of citrus. Lac insects in Mysore. Lac is extracted from Up to 200 insects. K.M. (eg) … The ultrastructure of wax glands (integumentary, stigmatic, and peristigmatic glands) was investigated in larvae, cysts, and adult females and males of species belonging to the genera Porphyrophora, Sphaeraspis, and Eurhizococcus.The general organization and cytological characteristics are similar for all glands studied. The word lac is derived from the sanskrit word laksha, which represents the number 100,000. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Scale insects may attack roots, bark, leaves, twigs, or fruits of plants. Harvesting and Extraction 5. The lac insects are sluggish and have almost sedentary life. Of the many species of lac insect,Laccifer lacca, (=Tachardia lacca) is the commercially cultured lac insect. The resin commonly called lac and is the only product of animal origin. history and introduction, biology hosts pruning of host plants processing of shellac natural enemies of lac insects and their management. Life cycle of lac insect... Plz subscribe Thanks for watching. See our Privacy Policy and User Agreement for details. Out of nine genera and 87 species of lac insects reported from the world, two genera and 19 species are found in India. In all 22 species have been recorded under the genus Laccifer in Indian subcontinent. With increasing globalization, bee colonies are transported over great distances and even between continents, in this way foreign species and their diseases are spread. If you continue browsing the site, you agree to the use of cookies on this website. The insects thrive in certain species of trees under suitable climatic conditions. In present the synthetic material such as Polyurethane and vinyl has been taken place of Lac, even after Lac is still in use as dyes, inks, polishes, sealing waxes, and as stiffening agents in the fabrication of felt hats. of lac resin. Plant tissue culture techniques of Banana, Customer Code: Creating a Company Customers Love, Be A Great Product Leader (Amplify, Oct 2019), Trillion Dollar Coach Book (Bill Campbell). This insect is … Funding Opportunities for Research project and Preparation of a Research Prop... New Education Policy-2020 with reference to Atmnirbahr Bharat, DNA sequencing- Maxam- Gilbert sequencing, No public clipboards found for this slide. The insect Laccifer lacca, living off the sap of certain trees, secretes lac resin.
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