Toxicity of some pesticides to Trichoderma viride Pers.

The toxicity of several fungicides, insecticides and acaricides to the important biological control agent Trichoderma viride Pers. has been evaluated in the laboratory. The effects of the pesticides on the spores and mycelium of T. viride and on the antagonistic activity of this fungus to Fusarium graminearum are reported. The insecticides cypermethrin, deltamethrin, fenvalerate, kelevan, carbaryl, carbaryl plus gamma-HCH (lindane), dimethoate, trichlorfon, diazinon, ethion and permethrin and the fungicides wettable sulfur, quinomethionate, dinocap, copper oxychloride and folpet were non-toxic to both the spores and the mycelium of T. viride.