Bioefficacy and phytotoxicity of coordinated fungicide (fluopyram 200 + tebuconazole 200-400 SC) against anthracnose and angular leaf spot disease of common bean under wet temperate conditions of Himachal Pradesh

The present investigation was undertaken to test the bio-efficacy of coordinated fungicide (fluopyram + tebuconazole) along with fluopyram, tebuconazole and carbendazim against angular leaf spot and anthracnose disease of common bean (Phaseolus vulgaris L.). All the treatments were significantly effective but fluopyram + tebuconazole (1.250ml/L) @ 125+125 g a.i./ha resulted in minimum i.e. 14.07 and 11.51 per cent average terminal disease severity of anthracnose and angular leaf spot, respectively. Along with minimum disease severity, it also resulted in highest disease control with 42.37 (2014) and 33.11 (2015) per cent increase in crop yield over the control and less AUDPC & infection rate values. The same combination at different doses (112.5+ 112.5g and 100+100g a.i./ha) were also effective. The solo use of fungicides was also effectual but the use of coordinated mixture had additive effects. Based on the effectiveness of fungicide along with its non-phytotoxicity on common bean, it could be included in the common bean integrated disease management programme.