Bioefficacy of vegetable and organic oils, cakes and plant extracts against mustard aphid Lipaphis erysimi (kalt.)

Bioefficacy of mustard oil @ 2%, linseed oil @ 2%, neem oil @ 2%, sesame oil @ 2%, diesel @ 1%, kerosene @ 1%, mustard cake @ 2%, sesame cake @ 2%, neem seed kernel extract @ 5%, dimethoate 30 EC @ 300 g a.i/ha and water spray against mustard aphid, Lipaphis erysimi (Kalt.) revealed that significantly higher reduction was recorded without any phytotoxic effect. Water spray alone did not play any significant role in reduction of population. These treatments were also found safe to natural enemies of aphid and to honey bee. Most favourable cost benefit ratio was obtained with dimethoate 30 EC @ 300 g a.i/ha (1:39) followed by kerosene @ 1% (1:21), neem seed kernel extract @ 5% (1:19), diesel @ 1% (1:14), mustard cake @ 2% (1:13), sesame cake @ 2% (1:10), neem oil @ 2% (1:8), mustard oil @ 2% (1:7), water spray (1:6), linseed oil @ 2% (1:5), sesame oil @ 2% (1:3) and water spray (1:2).