Field Bio-efficacy of Eco-friendly Bio-Rational Insecticides on Major Lepidopteran Pests of Cabbage
Mohammed Isaq *
Department of Entomology, College of Agriculture, Raichur, India.
Shivaleela *
Department of Entomology, College of Agriculture, Raichur, India.
Prabhuraj A
Division of Entomology, UAS, Raichur, Karnataka, India.
A Hosamani
Department of Entomology, UAS, Raichur, Karnataka, India.
Pampanna Y
Department of Horticulture, UAS, Raichur, Karnataka, India.
*Author to whom correspondence should be addressed.
Abstract
The experiment was conducted at College of Agriculture, University of Agricultural Sciences, Raichur, India during Rabi, 2022-23 for the management of major lepidopteran insect pests of cabbage. The treatments viz., Isaria fumosorosea 5g/L, Beauveriabassiana4g/L, Neem Seed Pellets Powder-NSPP 30g/L, commercial neem product 1500 ppm (Neemsuper-1500) 2ml/L, Lecaniciliumlecani4g/L, Commercial Bt (Bacillus thuringiensis var kurt saki) 2ml/L, Metarhizium rileyi 4g/L, Metarhizium anisopliae 4g/L and control were laid put in Randomized block Design and applied twice with three replications. Data indicated that per cent reduction in the larval population of DBM over untreated check was maximum in both the sprays commercial Bt(92.77%; 90.76%) followed by Beauveria bassiana (91.69%; 90.00%). Whereas, per cent reduction of head borer population was maximum with commercial neem (70.56%; 74.71%), followed by commercial Bt (61.93%; 65.19%). Commercial Btobtained a higher yield (20.01 t/ha). The field efficacy of eco-friendly bio-rational indicated that promising insecticides can be used as an alternative to chemical management.
Keywords: Bio-rationals, DBM, efficacy, head borer