Efficacy of different fungicides and weedicides against Macrophomina phaseolina (Tassi) Goid causing groundnut root rot

In this study, different systemic, non-systemic, combination fungicides and weedicides at four different concentration were evaluated in vitro against groundnut root rot pathogen Macrophomina phaseolina. Among the non-systemic fungicides, Mancozeb 75% WP and Propineb 70% WP were found most effective and showed (99.98 and 99.96 per cent) mycelia growth inhibition at all concentrations. Whereas in systemic fungicides, Carbendazim 50% WP were found most effective with (94.24 per cent) mean mycelial growth inhibition. Among different combination fungicides tested, Carboxin 37.5% + Thiram 37.5% WP were found most effective with mean mycelial growth inhibition of (97.16 per cent).. In case of weedicides tested, Quizalofo-p-pethyle 5% EC found as most effective inhibiting the mycelial growth of M. phaseolina at all concentrations with (90.92 per cent) mean mycelial growth inhibition. Sclerotial formation was also absent in all this treatments.