In vitro inhibition of Beauveria bassiana (Bals.) Vuill. growth by different commonly used insecticides in rice.

摘要

The in vitro inhibition of 13 different insecticides (endosulfan, dimethoate, monocrotophos, malathion, chlorpyrifos, carbofuran, dichlorvos, quinalphos, triazophos, cypermethrin, alphametrin [alpha-cypermethrin] and phosphamidon) and one botanical (Neemerin [Azadirachta indica]) on Beauveria bassiana growth was tested. Two doses of chemical insecticides, one at recommended dose (RD) and another at 1/2 RD, and 3 doses for the botanical, first one at RD, 1/2 RD and 1/4 RD, were tested. A 100% of mycelial growth was observed when the entomopathogen was grown in presence of monocrotophos (0.31%) and dichlorvos (0.12%). Cypermethrin, deltamethrin, alphamethrin [alpha-cypermethrin] and phosphamidon at RD showed growth inhibition of <50%. Half RD of deltamethrin had the lowest inhibition (14.06%)..