What are the main diseases of watermelon? How to prevent it?

Watermelon diseases mainly include watermelon wilt, watermelon leaf blight, watermelon wilt, watermelon gray mold, watermelon powdery mildew and so on. The control method is as follows:

1, watermelon wilt?

To prevent watermelon Fusarium wilt, disease-resistant varieties, such as Qiong Xue, can be selected before sowing. After the watermelon field is harvested, it is forbidden to rotate with melons and fruits, and the diseased melons should be removed in time to prevent infection. When melons get sick, they can be prevented by spraying chemicals. For example, you can spray phenylurea and manganese zinc once a week for about a month. ?

2. Watermelon leaf blight?

There are special disease-resistant varieties in the market, such as Zhengza 7. Pay attention to clean up the diseased melons after harvest and burn them centrally. Establish a good drainage system for watermelon fields and pay attention to rain protection in rainy days. Before the lesion appears, it can be sprayed with Sukeling wettable powder for a week or so. ?

3. Watermelon wilt?

The varieties resistant to Fusarium wilt in the market are Xinong 8 and so on. If you want to prevent Fusarium wilt, you can rotate water plants in watermelon fields, because the survival time of Fusarium oxysporum in water is only 100 days. Finally, choose nutrient-rich soil and don't use fertilizer with sick and disabled people. ?

4. Botrytis cinerea?

Gray mold is the most serious disease of watermelon, which will cause all watermelons in the whole field to be deformed and cannot be sold. Edible wuyiencin aqua and moxifloxacin wettable powder can be sprayed once a week for about one month. Rotation takes at least 4 years, and rich organic fertilizer should be used. ?

5. Watermelon powdery mildew?

The causes of powdery mildew are mainly related to temperature, humidity and density, so we should pay attention to the temperature and humidity of watermelon. Arrange the drainage system and planting density of watermelon field reasonably, pay attention to drainage after rain, and mainly apply organic fertilizer. Powdery mildew is mainly prevention.