In vitro evaluation of trichoderma species for the biological control of beauveria bassiana (Balls) vuill causing white muscardine disease of silk worm, Bombyx Mori L. under temperate conditions

Antagonistic potentiality of four isolates of Trichoderma species viz. Trichoderma viride isolate A, Trichoderma viride isolate M, Trichoderma harzianum isolate C and Trichoderma harzianum isolate L against Beauveria bassiana causing white muscardine disease of Silk worm, Bombyx mori L, was studied invitro by studying the mycelial interaction between them as well as by the effect of culture filtrate of biocontrol agents on sporulation and spore germination of pathogen.