Abstract:The present investigation entitled “Field efficacy of
Lecanicillium lecanii against cabbage aphid (
Brevicoryne brassicae) and impact of bio-pesticides on natural enemies” was carried out in the Horticulture Research Farm, Barrister Thakur Chhedilal College of Agriculture & Research Station, Bilaspur, (C.G.). In field condition maximum mortality 23.23% and 42.77% of cabbage aphid were found 5
and 7 DAT in chemical Imidacloprid 17.8 SL 0.3ml/lit., respectively.
Among the bio-pesticides, the maximum mortality of cabbage aphid 18.30% and 25.31% were found in treatment Paecilomyces lilacinus 10% 5 DAT and in Lecanicillium lecanii 5% 7 DAT, respectively.
The minimum mortality of cabbage aphid 9.89% and 14.98% were caused by treatment P. lilacinus 1.15%, 5 and 7 DAT, respectively.
The natural enemy of cabbage aphid, braconid, Diaeretiella rapae was found to parasitize the aphid by causing mummies to them and varied in between 1.81- 2.77 mummies/ plant.