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Parasitic wasps play major role in sustainable agriculture through their ability to regulate population of herbivorous insect pests and nutrition is the key component to the success of the parasitoids. In the present study, the effect of nutrition was revealed by a significantly higher survival of both male and female parasitoids when fed on sucrose and other vitamins as compared with water fed and unfed. The survival of adult wasps was also not much affected when different concentration of vitamins was tested except for pyridoxine in which survival of adult wasp was inversely related to concentration. Female parasitoids lived longer than the male in all treatments as well as in control. Parasitisation by female T. chilonis showed no significant difference except pyridoxine which showed lowest parasitisation percentage. The sex ratio in all treatments showed female biased populations except pyridoxine which showed male biased population. The present study may be helpful to select the best artificial food source which can be artificially sprayed in the field to increase the longevity and parasitisation potential of T. chilonis Keywords: Survival, Parasitisation, Trichogramma, Sex-ratio, vitamin, sucrose

iosr journal of agriculture and veterinary science

Role of vitamins on various biological aspects of an egg parasitoid, Trichogramma chilonis (Ishii) (Hymanoptera: Trichogrammatidae) on its laboratory host, Corcyra cephalonica