Effect of different fungicides against stem and root rot of sesame (Sesamum indicum L.) caused by Macrophomina phaseolina (Tassi) Goid

Abstract

Stem and root rot disease caused by Macrophomina phaseolina is the serious soil-borne disease in sesame. Thepresent study was conducted at College of Agriculture, Jodhpur during kharif season 2020-21 to evaluate the nine different fungicides under in vitro condition and five different fungicides under in vivo against M. phaseolina. Result of in vitro study indicated that the fungicide, carbendazim (50% WP) gave complete mycelial growth inhibition (100%) at 500 and 1000 ppm concentrations, respectively. Second best of pyraclostrobin 5% + metiram 55% WG, carbendazim12% + mancozeb 63%, then propiconazole 25% EC, thiophanate methyl (70% WP) and cymoxanil 8% + mancozeb 64% also gave 100% inhibition of mycelial growth at 1000 ppm respectively. The lowest disease per cent was recorded in combination fungicide of tebuconazole 50% + trifloxystrobin 25% WG (8.91%) followed by 9.14% with cymoxanil 8% + mancozeb 64%, pyraclostrobin 5% + metiram 55% WG (11.02%) whereas, maximum disease incidence was recorded in control plot (55.32%) when tested under in vivo condition.