What measures should be taken to remedy the flooded cabbage?

1. Clear ditches and drain stains to prevent dead seedlings. Watermelon needs a lot of water all its life, but it is extremely intolerant to waterlogging. Once it is flooded or has too much rain, it will often cause hypoxia in the root system and lead to suffocation and death of the whole plant. In the case of heavy rainfall, it is necessary to dredge the "three ditches" seriously, especially the fields with low terrain and easy water accumulation, and further widen and deepen the "three ditches". The specific method is to open vertical ditches on both sides of each melon ditch, waist ditches in the middle of the melons, and ditches around the melon fields. Vertical furrows are 3-35cm deep, waist furrows are 4-45cm deep, and enclosing furrows are 5-6cm deep, so that the furrows are connected, and the rain can keep the fields dry, thus protecting the development of roots and the robust growth of stems and vines, and setting up a high-yield seedling rack.

2. Artificial pollination to ensure fruit setting. Watermelon is an insect-borne cross-pollinated crop. Rainy weather will reduce the activities of pollinators, thus causing poor natural pollination and difficulty in fruit setting. Artificial pollination must be used to improve the fruit setting rate of watermelon. You can choose 7-1am on a sunny day and 8-11am on a cloudy day, pick the male flowers that are in loose pollen that day, remove the petals, and then aim the stamens of the male flowers at the stigma of the female flowers, and lightly paint them a few times to see obvious yellow pollen on the stigma. Generally, a male flower can give 2-3 female flowers. When artificial pollination is carried out in rainy days, the rainproof tube cover should be put on the female flower the day before flowering, and then put on it after pollination.

3. Spraying drugs in time to control pests and diseases. Rainy weather can easily induce blight, epidemic disease, anthracnose, aphids, yellow melons and other pests and diseases. If the prevention and control is not timely, it will often lead to a large-scale epidemic of pests and diseases, thus reducing the commodity of watermelon and reducing production. Therefore, it is necessary to be good at grasping the short sunny weather and spraying drugs in time to prevent and control it.