Field efficacy of fungicides and bio-agents against Alternaria leaf spot of Mung bean

Under laboratory conditions, out of 13 fungicides, hexaconazole (400 & 300 ppm) completely inhibited the fungal growth of Alternaria alternata and was found as the most effective fungicide. Among 6 bio-agents, Trichoderma viride gave highest fungal growth inhibition (51.7%), followed by T. harzianum (45.3%) and T. virens (41.4%). In field, among 11 fungicides, three sprays of hexaconazole (0.03%) proved most effective fungicide for controlling the disease of mung bean with minimum disease severity (6.3%), minimum disease incidence (13.5%) and maximum grain yield (868.0 kg/ha). Further, the next best fungicides were mancozeb (0.25%) and indofil Z-78 (0.2%). Among 6 bio-agents, T. viride gave highest grain yield (740.0 kg/ha) with minimum disease severity (17.4%) and disease incidence (29.4%), followed by T. harzianum.