How to Prevent Leaf Blight in Watermelons
The editor will answer how to prevent leaf blight in watermelons and the knowledge of green plants and flowers regarding the control methods for watermelon leaf blight. Let's get to know more together.
Preventing leaf blight in watermelons can start at the sowing stage by treating seeds before planting, which ensures the seeds are sterile and healthy. Leaf blight is prone to occur when the relative humidity reaches 80%. Therefore, during rainy and humid weather, it is important to enhance drainage and ventilation to avoid moisture buildup. Fungicides can also be sprayed appropriately during the growing period to prevent diseases. Let's find out more.
1. Choose a Good Variety
When sowing, choose a variety that is resistant to diseases and free from disease. Varieties like XINong No. 8 and XinHongBao are very good.
2. Clean Diseased Parts
After each harvest, thoroughly clean the garden, removing all diseased leaves and vines, which can be buried far away or burned collectively.
3. Reasonable Fertilization
Compost made from fermented bacteria can be used, and the amount of nitrogen fertilizer should be controlled. Before the melon sets,惠满丰 liquid fertilizer can be used, with 320 ml of the agent diluted in 500 times water for each mu of land.
4. Scientific Sowing
Sowing can take place when the daily temperature is stable at 15°C and the soil temperature at a depth of 5 cm is above 12°C. If you want to sow earlier, you need to cover the soil with plastic film to maintain the temperature.
5. Seed Treatment
Before sowing, seeds can be treated with a 50% wettable powder of metalaxyl-M at a concentration of 1000 times, or a 75% wettable powder of chlorothalonil. Soak the seeds in the fungicide for 2 hours, then rinse and wash them clean before germinating and sowing.
6. Trellis Cultivation
Single vine pruning, with about 1500 plants per mu of melon field. When there are 6-7 true leaves, the first female flower is removed, and 12-13 leaves are left in the later stage.
7. Timely Drainage
When planting, choose a location that is easy to drain. During rainy weather, dig ditches to drain accumulated water, as leaf blight is prone to occur when the relative humidity reaches 80%. In addition to drainage, increasing ventilation and sunlight can prevent excessive moisture and reduce the incidence of diseases.
8. Fungicide Control
Observe the weather, and before it rains or at the beginning of the disease, spray a 75% wettable powder of chlorothalonil at a concentration of 500-600 times, or a 50% wettable powder of metalaxyl-M at a concentration of 1000 times. When the relative humidity is high, you can spray an 80% wettable powder of Mancozeb (Metalaxyl-M 45) at a concentration of 600 times, or a 70% wettable powder of Mancozeb at a concentration of 400-500 times, etc., with an interval of 5-7 days between sprays, and continue for 3-4 times. After the rain, an additional spray of fungicides can effectively reduce the disease.
The above is the complete content on how to prevent leaf blight in watermelons and the control methods for watermelon leaf blight, for your comprehensive understanding and reference!