Department of Entomology, C.S.A. University of Agriculture & Technology, Kanpur - 208 002, Uttar Pradesh, (India).
Effect of fresh neem oil on mustard saw fly, Athalia proxima klug. was evaluated. Third instar larvae of A. proxima, were fed on treated mustard leaves and data on mortality, pupation and adult emergence were recorded. Maximum oil content of 50.75% was found from the neem seed kernel collected in the year 2000, followed by 46.46% in the year 1999 sample. Maximum larval mortality (47.5%) was recorded in 2% neem oil treatment followed by 1%, 0.5%, 0.25% and 0.125% concentrations. Pupal inhibition and inhibitory effect on adult emergence were most significant at 2% neem oil which were recorded as 47.5% mortality.
