author(s)
Krishna Avatar Meena

abstract
The bio-efficacy of some newer insecticides viz., cypermethrin 10 AF, indoxacarb 14.5 SC and acetamiprid 20 SP along with standard check cypermethrin 10 EC was evaluated against aphids Lipaphis erysimi (Kalt.), Myzus persicae (Sulzer) and diamondback moth Plutella xylostella (Linnaeus) on cabbage. As compared to the untreated check tested insecticides (at different dose levels) were significantly effective in reducing population of aphids and diamondback moth. However, three sprays of acetamiprid 20 g a.i./ha proved to be most effective in reducing the aphid population while cypermethrin 10 AF 200 g a.i./ha was effective against diamondback moth. The order of bio-efficacy in present investigation in descending order against aphids was acetamiprid 20 SP (20, 10 g a.i./ha) > indoxacarb 14.5 SC (75, 50 g a.i./ha) > cypermethrin 10 AF (200, 100, 75, 60 g a.i./ha) > cypermethrin 10 EC (75 g a.i./ha). The order of bio-efficacy in present investigation in descending order against diamondback moth was cypermethrin 10 AF (200, 100, 75, 60 g a.i./ha) > cypermethrin 10 EC (75 g a.i./ha) > indoxacarb 14.5 SC (75, 50 g a.i./ha) > acetamiprid 20 SP (20, 10 g a.i./ha).