1, Qinggou drainage. The root system of watermelon is extremely resistant to waterlogging, and even if it is flooded for a short time, the plants will be harmed, and it is very easy to cause root anoxia and cause plant death. After the rain, the gutter should be drained in a timely manner so that the time for water accumulation in the melon land should not exceed 10 hours. If possible, lightly use well water to increase oxygen in the soil and reduce ground temperature. 2, cultivating fertilizer. After the rain, it is easy to cause the loss of soil nutrients. Per acre topdressing compound fertilizer 10 kg. Timely tillage and weed control to prevent soil compaction. 3, preserved flowers. Summer sowing watermelon in the rain, with paper caps and flowers, and artificially assisted pollination, if the rain within 3 hours after pollination, and then re-supply 1 times. On the 15th day after flowering, 5 cm thick wheat straw was placed under the young larvae to prevent contact with infections on the ground and to reduce the risk of underground pests. 4, control of pests and diseases. In the case of high temperature and high humidity, watermelon is susceptible to fungal diseases, such as powdery mildew, anthrax, aphids, and spider mites. Anthracnose and powdery mildew can be treated with 65% mancozeb 500-600 times liquid, etc. Aphids, spider mites, etc. can be treated with 10% imidacloprid 2000-2500 times.
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