Vol. 11, Issue 9 (2022)

Author(s):
JG Piprotar, KK Kanzaria, RM Zankat and DS Kelaiya

Abstract:
A study was conducted at the Department of Plant Pathology, College of Agriculture, JAU, Junagadh during 2020-21 to find out the efficacy of different fungicidal groups at different concentration against A. niger under in vitro and in vivo conditions. In laboratory study among non-systemic fungicides, copper oxychloride 50% WP exhibited cent percent mycelial growth inhibition at 1000, 1500 and 2000 ppm concentrations followed by mancozeb 75% WP at 2000 ppm. Whereas, among systemic fungicides, carbendazim 50% WP, fluxapyroxad 333 g/L, propiconazole 25% SC and tebuconazole 2% DS gave cent percent mycelial growth inhibition at 100, 250 and 500 ppm concentrations. While, among ready-mixed fungicides, carbendazim 25% + mancozeb 50% WS at 1000 ppm, carboxin 37.5% + thiram 37.5% DS at 750 and 1000 ppm and fluxapyroxad 167 g/L + pyraclostrobin 333 g/L SC at 1000 ppm concentrations found the most effective treatments in inhibiting the cent percent mycelial growth of A. niger in vitro. In field evaluation of fungicides against collar rot disease of groundnut, the seed treatment of carboxin 37.5% + thiram 37.5% DS at the rate of 3 g/kg kernel found the most effective treatment with minimum disease incidence of 3.96 percent and 91.76 percent disease control followed by fluxapyroxad 167 g/L + pyraclostrobin 333 g/L SC (7.46 and 84.13) and penflufen 13.28% + trifloxystrobin 13.28% FS (8.84 and 81.18), respectively both at the rate of 2 g/kg kernel with the corresponding pod and haulm yield (kg/ha) of (1766 and 2735), (1725 and 2666) and (1688 and 2584), respectivley.