Persimmon "black ass" disease prevention and control
A: The "black buttock" disease shows that when the persimmon is nearing maturity, the onset of clumping of the persimmon fruit darkens, and then releases ethylene and quickly turns red, softens, rots, and falls off. The leaves are basically asymptomatic. Comprehensive prevention and control methods: 1. Apply more farmyard manure and potash fertilizer and less fertilizer. Adult fruit trees 1 month before the fruit enlargement period, per plant persimmon trees were used to compost 2 to 10 kg of manure and 0.1 to 0.2 kg of potassium sulfate, calcium, magnesium and phosphate respectively. 2. In the persimmon young fruit period, 100 kg of lime powder and 20 kg of sulfur are applied per acre. The improved soil promotes the absorption of trace fertilizers. This method can also treat anthrax. 3. Foliar application or root application of calcium, molybdenum, magnesium, iron and other trace element fertilizers. Mu root trace element fertilizer 10 to 20 kg.
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