Efficacy of some organic fungicides against anthracnose and powdery mildew of mango

Abstract

Anthracnose and powdery mildew are the two common maladies that attack mango at flowering and inflict heavy loss to fruit production. Seven organic and one inorganic fungicide were evaluated for their effectiveness against these diseases. In all, three bloom sprays were made, first at 25% flowering and two later sprays at 15-day intervals. Best results were achieved with Nativo 75% WDG (Tebuconazol+ Trifloxystrobin) which controlled anthracnose by 92.03% and powdery mildew by 90.19%. It was followed by Cabriotop 60% WDG (Metiram + Pyraclostrobin) which reduced incidence of these diseases by 89.08% and 88.04%, respectively, whereas Topsin-M 72% WP (Thiophanate methyl), Score 25% EC (Difenoconazol) and Shincar 50% SC (Carbendazim) provided less than 80% control. Topas 100% EC (Penconazole) and Vangard 25% EC (Tridamenol) were effective against powdery mildew (89.96% and 91.87%) and Champion 77% WP (Copper hydroxide) was against anthracnose only (82.64% disease control). In general, all the fungicide treatments significantly reduced incidence of the diseases and produced higher yield of quality fruits than control in both years.