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. In the summer, there are roughly three kinds of diseases that need to be controlled:
First, the epidemic
Seedlings of seedlings are easy to fall down, and adult plants are likely to cause root and stem rot, especially in the roots close to the soil. The first is water stains to brown patches, which quickly turns black and folds, which can easily result in flowering and fruit drop. The disease is most common with pepper. Control methods: First, seed treatment, soaking with 10% formalin solution for 30-60 minutes, removing and washing, and then sowing. The second is to use 98% copper sulphate per acre for 100 kg of water per acre in July-August each year. Third, at the beginning of the onset period, the plants were sprayed with 40% ethylphosphine aluminum wettable powder 400-600 times liquid and 25% metalaxyl 400-600 times liquid; Rhizoctonillus sp. 22% urea-zinc wettable powder 500-650 times spray, sprayed every 7 days, sprayed 2-3 times.
Second, gray mold
Botrytis cinerea is a fungal disease that is common in open field and protected areas and is more difficult to control. It can harm tomatoes, eggplants, summer squash and other vegetables. Farmers can use 40% pyrimethanil 800-1200 times solution, 50% cinepa rate 600 times solution or 40% Shijiale 800 times solution spray, spray once every 7-10 days, continuous 2-3 times, The effect is good.
Third, downy mildew
Downy mildew mainly damages tomatoes, eggplants, peppers, cucumbers and other vegetables. Can use 72% cream urea manganese zinc wettable powder 600-700 times spray, spray every 7 days, once sprayed 3-4 times; can also be used 72.2% Precike 600-800 times liquid spray 2-3 times, 7 days apart; 70% Bidefo WP can also be sprayed with 500-600 times of spray. When spraying, the liquid should be sprayed to the base of the leaves.
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