The main reasons for non-physiological fruit drop in ripening cherry are: 1. The cultivar is single or the pollination tree is not properly configured. 2. Tree malnutrition. 3. The temperature and humidity control is irrational: the temperature after flowering is too high before flowering. If the temperature in the shed exceeds 25 degrees Celsius during the daytime, the flower organs will be injured and the physiological fruit drop will be aggravated. Humidity is too large during flowering, and it is also likely to cause inactivation or stickiness of pollen water, and it is difficult to spread and affect fruit setting. 4. Extensive management. Severe pests and diseases, as well as the scope and objects of pesticide control, are unclear, and often cause fluid injection, perforation, early defoliation, and aggravated flowering and fruiting.
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