1. Powdery mildew 1 disease symptoms, powdery mildew is the most common disease in the production of white squash. It is heavier in the later stage of growth, and mainly damages the leaves. In severe cases, the petioles and stems are also affected. At the early stage of the disease, small moldy spots appeared on the front of the leaves, and then expanded to 1 to 2 cm of mildew. Under suitable conditions, molds quickly expanded, and the entire leaves were covered with each other, which seriously affected the maturity and yield of the white gourd. 2 Control methods, spraying 20% ​​triadimefon EC 2000 times; 40% polysulfide suspension 600 times; 2% antimycotic (agricultural 120) water 200 times; 27% lipid membrane Emulsion 80 to 100 times liquid. The main points of prevention and control are early defense, noon defense, and spurt and heavy water.
2. Disease symptoms of Botrytis cinerea 1 mainly damage young fruit and larger fruits. The bacteria first invade from the unsuccessful flowers, causing the flowers to rot and grow a pale gray brown moldy layer, and the damaged flowers and young fruits. The peduncle was initially immersed in water and gradually softened, and the surface was thickened with a layer of gray green mold, which caused the melon to rot. 2 control methods, spraying 500% quick-acting WP 2000 times; 15% acetaminophen wettable powder 1500 times; 15% anti-mildew WP 1000 times; 5% thiophanate-methyl can be Wet powder 500 times. Prevention and control points, each spraying liquid per acre of 60 to 65 kg. Should replace the medication and even prevent 3 to 4 times.
3. Disease symptoms of cotton rot 1 mainly affect the fruit. At the early stage of the onset of the disease, dark and green lesions were observed in the shape of ovals and flooding. When the humidity was high and the temperature was high, the lesions spread rapidly. The entire fruit became brown and soft, and the surface was covered with a layer of white mold, causing the melons to rot in the fields. 2 Prevention and control methods, spraying 14% Luohu Copper Water Solution 300 times at the beginning of the disease; or 50% Humic Acid Copper (DT) wettable powder 500 times. Control points, spray once every 10 days or so, and spray 2 or 3 times.
2. Disease symptoms of Botrytis cinerea 1 mainly damage young fruit and larger fruits. The bacteria first invade from the unsuccessful flowers, causing the flowers to rot and grow a pale gray brown moldy layer, and the damaged flowers and young fruits. The peduncle was initially immersed in water and gradually softened, and the surface was thickened with a layer of gray green mold, which caused the melon to rot. 2 control methods, spraying 500% quick-acting WP 2000 times; 15% acetaminophen wettable powder 1500 times; 15% anti-mildew WP 1000 times; 5% thiophanate-methyl can be Wet powder 500 times. Prevention and control points, each spraying liquid per acre of 60 to 65 kg. Should replace the medication and even prevent 3 to 4 times.
3. Disease symptoms of cotton rot 1 mainly affect the fruit. At the early stage of the onset of the disease, dark and green lesions were observed in the shape of ovals and flooding. When the humidity was high and the temperature was high, the lesions spread rapidly. The entire fruit became brown and soft, and the surface was covered with a layer of white mold, causing the melons to rot in the fields. 2 Prevention and control methods, spraying 14% Luohu Copper Water Solution 300 times at the beginning of the disease; or 50% Humic Acid Copper (DT) wettable powder 500 times. Control points, spray once every 10 days or so, and spray 2 or 3 times.
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