Botrytis cinerea: mainly damage flowers and young melons. Many pathogens invade from flower failure, causing flowers and fruits to rot and grow a layer of gray mold. The disease has a severe onset at lower temperature and higher humidity conditions. Control methods: Strengthen management, cover the mulching film with high sorghum, properly control water, often ventilate and remove moisture, remove diseased flowers, diseased leaves, etc. in time; 50% Sucrose WP 1000 times, or 50% Due to the alternating use of 1500 times liquid and 50% carbendazim WP 500 times liquid, spray for 6-7 days and spray 3-4 times continuously. Downy mildew: Onset of disease at the seedling stage, yellow spots in the damaged parts of the cotyledons, and finally withered; the original leaves were damaged by water stains, developed a polygonal yellow lesion, easily broken when dry, and the long helmet was colored on the back of the lesion under high temperature conditions. Mold layer. Control methods: 58% of 500 mg of thiazole manganese zinc, 25% of thiram and 70% of mancozeb 1:2 mixed, or 64% of antiviral 400 times, 6-7 days 1 time, spray 3-4 times alternately. Shrinkage disease: a physiological disease. In the growth of the plant, many successive leaves showed chicken-like collapse, the fruit set-up rate was very low, even without fruit set, and it was easily mistaken for virus disease. The main causes of morbidity are the temperature difference between day and night and the high air humidity, the growth point water is inhibited, and the leaf development is not normal. In the production, it is necessary to control the change of temperature to prevent the occurrence of a large temperature difference, and to control the humidity at the same time. Medical Injection And Infusion Products Syringe Needle,Medical Needle,Disposable Insulin Syringes Fixed Needle,Medical Syringe Needle Surgimed Medical Supplies Co.,Ltd , https://www.surgimedcn.com
Spring and Autumn Squash Disease Prevention and Control
Powdery mildew: Powdery mildew mainly damages the leaves. In the early stage of disease, white round and small patches appear on the back of the leaves, and they continuously expand to the surroundings. In severe cases, the leaves are covered with white powder. The mildew in the later stage turns white and sometimes on the lesions. Generate black spots. Control methods: Spray 15% triadimefon 1000-1500 times liquid, or 50% sulfur suspension 250-300 times liquid at the beginning of the disease, spray once every 7 days, use alternately.
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