Effect of Certain Fungicides and Trichoderma Spp. on the Growth Parameter, Yield Attributes and Yield Affected by Powdery Mildew of Green Gram (Vigna radiata L.)

Powdery mildew is an important foliar disease of green gram caused by Erysiphe polygoni DC. in India. An experiment was carried out to evaluate the efficacy of fungicides (Propiconazole, Carbendazim, Wettable sulphur, Mancozeb) and bio-agents (Trichoderma viride, T.harzianum,) against powdery mildew of green gram in the Central Experimental Field, Department of Plant Pathology, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj during the kharif season 2018–19. The experiment was laid out in randomized block design (RBD) with seven treatments and each replicated thrice. In a field assay, maximum plant height (71.11) cm was observed in Trichoderma viride as foliar spray followed by Trichoderma harzianum, Carbendazim, Wettable sulphur, Propiconazole and Mancozeb. The experiment revealed that, among the treatments Carbendazim, as foliar spray was most effective with maximum length of pods (7.27) cm and weight of pods (5.6) g followed by Wettable sulphur, Propiconazole, Mancozeb, Trichoderma harzianum and Trichoderma viride. Maximum yield was recorded with Carbendazim (10.15) q/ha, as foliar spray followed by Wettable sulphur (9.76) q/ha, Propiconazole (9.22) q/ha, Mancozeb (8.60) q/ha, Trichoderma harzianum (7.88) q/ha and Trichoderma viride (7.22) q/ha.