Vol. 12, Issue 7 (2023)

Author(s):
Lavkush Salame, Birjhu and Kamal Narayan

Abstract:
Field investigation were laid out to test the efficacy of bio-pesticides against onion thrips during 2019-20 at Horticultural farm of BTC College of Agriculture and Research Station, Bilaspur, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.). Eight treatments (entomopathogenic fungi and botanicals insecticides) were evaluated for their efficacy against onion thrips. The treatments were Spinosad 45 SC @ 0.016% was found to be most effective against onion thrips, with lowest population of thrips (7.83 nymph and adults/plant), and maximum 61.72% population reduction of thrips. Garlic extract 5% was next best treatment (12.58 thrips/plant) with 38.57% reduction in thrips population. Next best treatment was Beauveria bassiana 10.00% WP (1x10⁹ CFU/g min) @ 10 ml/lit. of water (13.23 thrips/plant) with reduction 35.44% population, Metarhizium anisopliae 10.00% WP (1x10⁹ CFU/g min) @ 10 ml/lit. of water (13.58 thrips/plant) with reduction 33.69% population, Lecanicillium lecanii 10.00% WP (1x10⁹ CFU/g min) @ 10 ml/lit. of water (13.74 thrips/plant) with reduction 32.91% population and next better treatment was NSKE 5% (14.01 thrips/plant) 31.59% reduction population and least control by Plain water @ 500 lit.ha^-1 (16.95 thrips/plant) and control (20.48 thrips/plant) reduction 17.24% population over to control.