Asian Journal of Bio Science

Shrikant S. Chavan ¹

Affiliations
1 Department of Sericulture, College of Agriculture, U.A.S. (D), Bijapur (Karnataka), IN

Abstract

The life-table of uji fly, Exorista bombycis L. was construction through 16 generation using fourth stage of Pure Mysore silkworm race as a host for depositing eggs with the different biotic characters like, mortality at every stage of its life cycle (eggs, maggots, post-parasitic maggots, puparia and adults) in the rearing room. Maximum percentage of mortality at puparia, adults, maggots, eggs and post-parasitic maggots stages was 36.04, 23.25, 17.62, 17.36 and 10.07 per cent, respectively. Similarly, the survivability rate varied at different stages, being minimum at pupal stage (63.96%) compared to adult (76.75%), maggot (82.38%), egg (82.64%) and post-parasitic maggot stages (89.94%). The number of individuals dying within the age and mortality factors are responsible for every stage of its life cycle have been discussed.

Keywords

Silkworm Larvae, Uji Fly, Life-Table, Mortality, Survivability.

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Shrikant S. Chavan ¹

Affiliations
1 College of Agriculture, U.A.S. (D), Bijapur (Karnataka), IN

Abstract

The ovipositional deterrent and ovicidal activities of uji fly by spraying with different plant products on oviposition against uji fly (E. bombycis L.) on silkworm was studied by spraying varied concentrations, viz., 1.00, 2.00 and 3.00 per cent on second day of fifth instar larvae on which eggs were laid. Significant differences were noticed among the plant products and it was lowest number of eggs laid by spraying with pongamia oil at 3 per cent concentration (2.00) followed by Mahua oil (8.00), Clerodendron innerme (11.00) and highest (17.66) with Vitex negundo as against the control (84.33). Similar trend was recorded, percentage of eggs laid over the total eggs laid was also lowest at 3 per cent (2.32) on Pongamia oil and it was highest (17.31) with Vitex negundo. As the concentration increased, the number of eggs laid decreased in all the plant products. The rate of eggs hatchability was nil at 3 per cent concentration on Pongamia oil as against the control (86.02%). The egg hatchability reduction over control was maximum (33.47%) at 3 per cent on Vitex negundo and it was nil at 3.00 per cent on Pongamia oil. Hence, the use of plant products could be an eco-friendly and low cost method for managing uji fly.

Keywords

Silkworm, Botanical Oils, Botanical Leaf Extract, Uji Fly.

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