CHEMOTHERAPTIC MANAGEMENT OF ALTERNARIA BLACK SPOT (ALTERNARIA ALTERNATA) IN MANGO FRUITS

A study was conducted in the Department of Plant Pathology in collaboration with Institute of Horticultural Sciences, University of Agriculture, Faisalabad during the year 2008. The objective was to see the effect of five different fungicides like Prochloraz, Deconil, Carbendazim, TBZ (Thiabendazol) and Mancozeb as dip treatments on black spot decay of mango during storage at 20°C. The results revealed that Mancozeb and Prochloraz proved as the most effective fungicides. Maximum mean lesion diameter was observed in control (15.72 cm) followed by Daconil (15.55 cm) and Carbendazim (8.96 cm). Minimum lesion diameter was observed in case of Mancozeb (5.12 cm). The efficacy of hot water treatment was also tested with a temperature range of 40 to 60°C. Maximum mean lesion diameter (15.42 cm) was obtained in hot water treatment of 45°C followed by 50°C (13.52 cm) and 55°C 12.52 cm). The lowest mean lesion diameter (11.14 cm) was achieved at 60 °C. Hot water treatments of fruits significantly reduced decay development caused by Alternaria.