Combination between Benzothiadiazole and Trichoderma Viride to Control Chocolate Spot Disease of Faba Bean and Their Effects on some Biochemical Characters

Faba bean is a food plant in many countries in the world. Botrytis fabae is a fungus that caused chocolate spot disease in faba bean . In this work , two concentrations of benzothiadiazole ( 0.3 and 0.5 mM ) and suspensions of Trichoderma viride prepared in two concentrations ( 1 × 10^7 and 2 × 10^7 spore/ml ) .The concentrations of benzothiadiazole and Trichoderma viride used alone and in combination to control chocolate spot disease in faba bean . Application of benzothiadiazole and Trichoderma viride reduced chocolate spot disease when used alone or in combination as foliar treatment . Total chlorophyll content and flavonoids content were increased when benzothiadiazole and Trichoderma viride used in treated plants compared to the infected control and to the plants treated with Tridex 80 % wp .