Evaluation of fungicides against cowpea rust caused by Uromyces phaseoli var. vignae (Barcl.) Arth. in vitro and glasshouse conditions

The evaluation of four each of systemic, non-systemic fungicides and combi-products against cowpea rust revealed that hexaconazole 5 EC, propiconazole 25 EC at (0.1% and 0.15% concentrations) and zineb 68 WP + hexaconazole 5 EC (at 0.2% and 0.25% concentrations) were found very effective against rust pathogen. Similar results under in vitro condition on pea plants treated with seven fungicides viz., fenarimal, difenconazole, triadimefon, cyperconazole, flusilazole, henconazole and hexaconazole and two non-systemic, mancozeb and chlorothalonil fungicides, after being inoculated with Uromyces viciae fabae aeciospores for 72 hr, was reported by Gupta and Shyam (2000). Cyperconazole, flusilezole, penconazole and hexaconazole inhibited incidence and severity of rust on leaves completely. Mancozeb and chlorothalonil resulted in 22.91 and 38.75 per cent rust severity, respectively.