Department of Entomology, College of Agriculture, GBPUA&T, Pantnagar-263145, Uttaranchal, India.
Trichogramma chilonis Ishii. cards treated with Ipomoea palmata extracts showed highest parasitisation (50.66) and emergence (46.00) followed by those treated with Cynodon dactylon extracts. The lowest mean per cent parasitisation (13.33) and mean percent emergence (12.00) were observed in the cards treated with Gynandropsis pentaphylla extracts. The mean per cent parasitisation by T. japonicum was highest (49.33) on cards treated with Trianthema portulacastrum extracts followed by Echinochloa colonum extracts (47.33). Whereas it was lowest for Euphorbia hirta (15.00) and Parthenium hysterophorus extracts (17.00). The mean per cent emergence was high in the cards treated with E. colonum (44.00) followed by T. portulacastrum extracts (42.00). The mean per cent emergence was lower in the cards treated with G. pentaphylla extracts (12.00). T. poliae has shown the highest mean per cent parasitisation (44.33) and emergence 43.33 on the cards treated with I. palmata. The lowest mean per cent parasitisation (14.00) and emergence (12.00) were on the cards treated with E. colonum extracts.
