Chemical Control of Mustard Aphid, Lipaphis erysimi Kaltenbach

The results of 11 different insecticide treatments showed that the treatment with methyl-o-demeton 0.025%, carbosulfan 0.04%, methyl parathion 2% dust @ 25kg/ha and monocrotophos 0.04% were found highly effective against mustard aphid, Lipaphis erysimi Kaltebach. Profenophos 0.05% and azadirachtin 0.00075% were found less effective against this pest. Considering the seed yield, two sprays of methyl-o-demeton 0.025% gave maximum seed yield (1575 kg/ha). The treatment with phosphamidon 0.03% was found more economical as it gave the highest cost benefit ratio (1: 12.7) followed by methyl-o-demeton 0.025% (1:8.2), monocrotophos 0.04% (1:7.7) and methyl parathion 2% dust @ 25 kg/ha (1: 6.6).