The disease is most common with peppers. For prevention and treatment, the first is seed treatment. Use 10% formaldehyde (formalin) to soak seed for 30-60 minutes, remove and rinse, and then sow. The second is that from July to August each year, 98% copper sulfate is used to irrigate the roots at 0.8-1.2 kg per 667 square meters of water and 100-150 kg of water. Third, at the beginning of the onset period, the plants were sprayed with 400-600 times of 40% aluminum phosphonium WP, or 400-600 times of 25% of the cream, and roots were also irrigated with 400 times the amount of Borax, and the plants were sprayed with 600 times. This fungal disease of gray mold can damage tomato, eggplant, and squash. The main use of 50% carbendazim or moldy mildew prevention. 600-800 times the liquid spray, spray every 7 to 10 days, 2 or 3 times in a row, the effect is particularly good. Downy mildew mainly damages tomato, eggplant, pepper, cucumber and so on. Can be used 72% frost urea manganese zinc wettable powder that is "breast epidemic clear" 600 ~ 700 times spray, sprayed every 7 days, once sprayed 3 to 4 times; also available 72.2% Preclo 600 ~ 800 times liquid sprayed 2 ~ 3 times, each time interval of 7 days; can also be used 70% Biofer wettable powder 500 ~ 600 times liquid spray. (Wang Deming; Gao Shaoying; Zhu Zhigang)
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