Evaluating bio-pesticides against sap suckes of yard long bean

Abstract

A field experiment was undertaken at research field of Entomology Division at Regional Agricultural Research Station, Jashore to evaluate the effect of four bio-pesticides and a chemical insecticides namely Bio-catch (Vertcillium lecani 1.15 WP), Bio-power (Beauvaria bassiana 1.15 WP), Bio-Magic (Metarhizium anisopliae 1.15 WP), Bioclean (D- limonene 5%) and Imitaf (Imidacloprid 200 SL) against the sucking insect pests of yard long bean viz., aphid, jassid and thrips during the kharif-1 season (March to July) of 2022 and 2023. The chemical insecticides Imitaf @ 0.5 mlL^-1 of water showed the best performance in reducing the infestation of the insect pests, resulting the higher yield and MBCR. The bio-pesticide, Bio-Magic @ 6 gL^-1 of water offered second the best performance, while the other bio-pesticides offered intermediate level of performance. The Imitaf @ 0.5 mlL^-1 of water appeared best as it provided the lowest abundance of aphid, jassid and thrips (0.83,1.67, 1.33) while the highest percent reduction over untreated control (91.70, 85.69, 82.66%). The highest yield increase over control was calculated from Imitaf @ 0.5 ml/L of water (46.07%) followed by treatment Bio-Magic @ 6 g/L of water (29.67%). Bio-Magic @ 6 gL^-1 of water may be used in IPM program against aphid, jassid and thrips attacking yard long bean.

Bangladesh J. Agril. Res. 48(4): 481-493, December 2023