Three commonly used soil insecticides viz., BHC, phorate and carbofuran meant for the control of soil borne pests were studied for their in vitro influence on the growth, sporulation and cellulase production by Trichoderma harzianum. The insecticides were tested at 5, 10,50, 100 and 500 ppm concentrations. Among the insecticides, phorate and carbofuran caused maximum reduction of mycelial biomass. Sporulation was strongly inhibited by BHC when compared to other insecticides. The production of cellulases was drastically reduced by incorporation of phorate.
Keywords
Cellulase Production, In Vitro Growth, Soil-Insecticides, Sporulation, Trichoderma harzianum.
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