1, fertilize potash fertilizer. If the diseased plant rate is above 10%, the use of potassium chloride 3-5 kilograms, or plant ash 50 kilograms, plant strain rate of 10-20%, 8-7 kilograms of potassium chloride with acres, or 80-100 kilograms of plant ash. The rate of diseased plants is more than 30%, with 10-15 kg of potassium chloride in mu, or 100-150 kg of vegetation ash. When potassium fertilizer is applied, it is best to use potassium chloride for watering, grass and wood ash should be applied alone, and avoid using together with chemical fertilizer and water dung. Multiple composite fertilizers plus potassium dihydrogen phosphate foliar spray are also available.
2, pharmaceutical control. Use 50% carbendazim + 40% alfa-aluminum 1000 times or 70% thiophanate-methyl + 40% alfa-aluminum 1000 times to irrigate the roots, 100 grams per strain.
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