OPTIMIZATION OF FOLIAR APPLICATION OF INSECTICIDES AGAINST LINSEED BUDFLYDASYNEURA LINI

摘要

The field experiments conducted for two consecutive years revealed negative association between infestation (BFI%) caused by budfly (Dasyneura lini Barnes) and seed yield of linseed. It was also observed that 3 to 5 rounds of foliar spraying of imidacloprid (0.003%) proved to be economically superior to 6 sprayings. Higher net monetary returns (Rs. 7220 ha~(-1)) with the highest benefit ratio of 3.44 was achieved when the crop received 5 sprays with imidacloprid (0.003%) with additional gain in seedyield of 4.66 q ha~(-1) over the unprotected crop.