An experiment was conducted during 2007-2008 and 2009-2010 to evaluate the efficacy of neem- based formulation against linseed bud fly, Dasyneura lini Barnes for three consecutive rabi seasons. Bud fly incidence was found low in Neem Seed Kernel Extract (NSKE) @ 5% than by Neem Seed Extract (NSE) @ 5%. Mean grain yield was high in NSKE@ 5% treated crop with (1287.20 kg/ha) than NSE@ 5% (1271.74 kg/ha). The higher seed yield in treated plots might have been obtained due to reduced incidence of the pest. Maximum net profit was gained

from the plot treated with NSKE @ 5% (Rs. 9150.33) followed by NSE @ % 5 (Rs. 8763.75) and Nimbolin @ 0.5% (Rs. 6690.25). Similarly, Incremental Cost Benefit Ratio (ICBR) earned highest with NSKE @ 5% (16.34) closely followed by NSE@ 5% (15.65) and Nimbolin @ 0.5% (13.94).