2. Prune in time, control growth, promote plant health, and lay the foundation for early and full fruit. When the vines are longer than 33.3 cm, select strong lateral vines from the stems of the main vines and remove the remaining lateral vines and secondary vines. Fruit hanging period should be done well. Generally, the fruit formed by the first female flower is not left, but the fruit formed by the second and third female flowers is left. Generally, it is best to leave two melons per plant. Spraying Zhuangguadiling once before flowering, at the young fruit stage and at the fruit expansion stage can thicken the pedicel of melon, strengthen the directional transport of nutrition, promote the rapid development of melon, and make the melon beautiful in appearance and delicious in juice. The growth cycle does not drop flowers, melons, cracked melons and deformed melons.
3, timely prevention and control of pests and diseases. When sowing, seeds can be dressed with diluted new high-fat film liquid, which can repel underground pests and diseases, isolate virus infection, do not affect the function of germination and imbibition, strengthen respiratory intensity and improve seed germination rate. Spraying a new type of high-fat film liquid on watermelon field at seedling stage can prevent leaf virus infection, make leaves lush, enhance the accumulation and directional transportation ability of photosynthetic products, and improve the ability of crops to resist external pests and diseases.