gio-Efficacy of New Combination Products against Downy Mildew of Grapes

摘要

Bio-efficacy of new combination products viz., fenamidone 10%+mancozeb 50% and fenamidone 4.44%+fosety! Al 66.6% were evaluated against downy mildew of grapes during November-December for two years (2000 and 2001). The results indicated the superiority of these combination products at different dosages viz., 1.0 and 1.5 kg/ha f皉 fenamidone 10%+mancozeb 50% and 2.0 and 2.5 kg/ha for fenamidone 4.44%+fosetyl Al 66.6% in reducing the disease by more than 79.5 and 84.5%, respectively, over unsprayed control. These combination products were significantly superior over other fungicides (Metalaxyl MZ, fosetyl Al and mancozeb) when applied alone in reducing the downy mildew incidence without any phytotoxic effects.