What are the control methods for acute physiological wilting in watermelon?

1. To prevent and control acute physiological wilting in watermelon, start by protecting the root system and promoting root growth and development, coordinate the relationship between root growth and stem and leaf growth, and maintain a balanced water metabolism in the plant.

2. After watermelon seedlings are established following transplanting, appropriately lower the nighttime temperature in the greenhouse, increase the temperature difference between day and night, control aboveground growth, and promote deep rooting.

3. When growing watermelon, do not apply undecomposed manure, and do not apply too large a single dose of chemical fertilizer as a topdressing.

4. During prolonged rainy weather, after it clears, put the straw curtains back down for shade during the high-temperature period at noon, and remove the straw curtains only after conditions moderate; do not rush to ventilate. If wilting has already occurred, you can spray water into the air to increase air humidity, or spray water directly on the plants.