Studies on host sex pheromone interaction in parasitization behaviour of Trichogramma chilonis Ishii (Trichogrammatidae: Hymenoptera) in brinjal ecosystem
P Dominic Manoj, G Ravi
The brinjal shoot and fruit borer, Leucinodes orbonalis Guenee is the most noxious and destructive pest of brinjal and widely distributed in South Asian countries. In this present study the behavioural approach of use of sex pheromone is found compatible with augmentative biocontrol Trichogramma chilonis Ishii suggested for L. orbonalis. The laboratory study indicated that the maximum number of parasitization in Corcyra card + pheromone lure (77 eggs/ card) which is higher than in host egg placed alone (73.33 eggs/ card). In field condition also a maximum numbers of parasitization was observed in brinjal cropped plot imposed with sex pheromone trap (29.04 eggs/ card) compared to brinjal sole cropped plot (28.59 eggs/ card). The findings of the present study has greater potential for inclusion in the organic cultivation of brinjal crop in the light of emerging demand for the organic produce in the WTO era.