Evaluation of insecticidal schedules for the management of bud fly (Dasyneura lini) in linseed (Linum usitatissimum)

Field experiments conducted during 1995-97 on the bioefficacy of different insecticidal schedules for the management of bud fly (Dasyneura lini Barnes ) in linseed (Linum usitatissimum L.) revealed that two foliar sprays of ph osphamidon (0.03%) along with soil drenching of chlorpyrifos (0.05%) had si gnificantly minimum bud fly infestation of 15.71% with higher seed producti on of 2 055,55 kg/ha, providing Rs 15 578/ha as net monetary return. Howeve r, alternate application of phosphamidon (0.03%) followed by deltamethrin ( 0.002%) also had significantly lower bud infestation (17.45%) with 1 972.22 kg/ha seed yield having maximum net monetary return of Rs 15 633/ha with h igher benefit : cost ratio of 22.33: 1. Average avoidable losses in yield w ere estimated up to 60.81%.