Due to physiological reasons, the shape of watermelon fruit is abnormal, including flat-shaped fruit, sharp-nosed fruit, gourd-shaped fruit, migraine-shaped malformed fruit, and angular fruit. Causes of morbidity: 1. Low-level female flowers in round varieties have been found to produce flat fruits at low temperature, dry, fertile, and calcium-deficient. 2. Long fruit-shaped cultivars form sharp-nosed fruit under inadequate conditions of nutrient and moisture during fruit development, and the fruit can not fully expand. 3. In the early stages of fruit and vegetable expansion, the fertilizer and water are insufficient, and the improvement of water and fertilizer conditions in the later stages will result in the formation of tumuli melon and melon head. The current period of adequate water and fertilizer conditions, dehydration at the end of dehydration, will form a sharp mouth melon, small melon or thick skin melon. Partial temperature difference between the fruit is too large, the fruit is partially damaged, and so on. 4. Uneven fruit development caused by uneven pollination, full side of pollination developed normally and the development of the other side stopped to form migraine. 5. The early development of melon met bad environmental conditions such as low temperature, dryness, lack of light, the late conditions improved and continue to develop, form a flat melon, micrantha, Dagu melon. When the fruit develops at a late stage when it is cold and dry, it often forms sharp-edged melons. Control methods: To reduce malformed fruit is an important part of improving the commercial quality of fruit. In addition to taking precautions against the above factors, it is also necessary to strengthen field management. 1. Add organic fertilizers, together with Linshihai Biostimulator (root type), promote root growth and improve soil. 2. To promote the smooth expansion of the fruit, and pay attention to the control of fruit-setting sites, pollen sprinkled on the stigma should be uniform when artificial pollination. 3. Reasonably select the melons that stay in the fruit, and select the young fruit that is round in the ovary; if the whole vine spreads, remove the malformed young fruit.
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