The death of watermelon is called "watermelon wilt disease" and it is a devastating disease. It can occur from the stretch of watermelon to the nectarine stage, especially in the mid-stage. Here's a simple and easy way to prevent watermelon dead cockroach: Take urea, potassium dihydrogen phosphate, and 50 grams of sugar for each mu of melon. After the three are mixed, dissolve with warm water and then add water. Mix up to 50 kg. Starting from the beginning of watermelon seedlings, spray the stems and leaves of watermelon plants once every 7 days, spraying even 2-3 times, and the control effect can reach more than 95%; this mixture can also be used for irrigating at the early stage of disease. Watering once every 3 days, continuous watering 3 times.
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