SEASONAL ACTIVITY OF EGG PARASITOID, TRICHOGRAMMA CHILONIS ISHII ON DIAMONDBACK MOTH, PLUTELLA XYLOSTELLA (LINN.) INFESTING CABBAGE (LEPIDOPTERA : PLUTELLIDAE)

Studies were conducted to investigate the seasonal activities of egg parasitoid Trichogramma chilonis on the eggs of Plutella xylostella. The activities of T chilonis were on the peak during 5" and 9" standard meteorological weeks in 2000-01 and 2001-02 with 50.2 and 338 per Cent egg parasitization. The egg parasitoid shows a positive correlation with host eggs during both years of experimentation.