Compatibility of Nomuraea Rileyi (Farlow) with common pesticides used in vegetable ecosystem of Assam

In vitro compatibility of Nomuraea rileyi (farlow) was studied with six commonly used pesticides in vegetable ecosystem by poison food technique at recommended dose (rd) and half of recommended dose (1/2RD). The results were expressed in percent mycelial growth inhibition of N. rileyi colony on the insecticide treated medium. At field recommended dose of chlorpyrifos 20% EC with highest inhibitory effect (79.21%) of N. rileyi was observed. this was followed by malathion 50ec (77.88%) and azadirachtin 0.5% (61.33%) whereas bifenthrin 10%WP, imidaclorpid 17.8% Sl and thiomethoxam 25% WG were found to be moderately toxic. Half of the recommended dose of malathion 50 ec, bifenthrin 10% WP and chlorpyrifos 20% ec were, however, tolerated well by N. rileyi showing growth inhibition < 50%. thiomethoxam 25% WG was found to be best in compatibility to N. rileyi with lowest per cent of growth inhibition (20.78%).