In summer, when the temperature is high and it is rainy, the vegetables are prone to diseases, and the appearance and food quality are affected, and the production is greatly reduced. Therefore, it should be planned and controlled. The seedlings of the epidemic seedlings are prone to tripping, and the roots and stems are easily rotted in the adult planting stage. In particular, the roots and stems near the soil are quickly contaminated with water stains and brown spots, and are then folded over, resulting in falling and fruiting. The most common is pepper. 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 m2 and 100-150 kg 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 600 times. With 22% cream urea zinc WP 500 to 650 times, spray every 7 days, once, and spray 2 or 3 times; 50% carbendazim WP 500 to 800 times spray; 64% antivirus 500 times spray. ? Fungal diseases such as gray mold can damage tomato, eggplant, gourd and so on. 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 damage tomato, eggplant, pepper, cucumber and so on. 72% frost urea MnZn wettable powder can be used, ie "Qinqingqing" 600 ~ 700 times spray, sprayed every 7 days, once sprayed 3 to 4 times; 72.2% of the water can also be used in Prec 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.
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