Grapes produce fruit cracking before and during berry ripening, resulting in reduced grape yield and reduced quality. The reasons and prevention methods are as follows: Improper use of ripening agents. If the concentration of ethephon sprayed ripening agent is too high or the period is not appropriate, it is easy to produce cracks. Therefore, when using ethephon, dilute strictly according to the regulations. During the spraying period, select a slightly sweet taste on the grape and the acidity can be tolerated. Powdery mildew hazards. After powdery mildew attacks the fruit, the fruit grows slowly, the color becomes darker and loses its elasticity. When it rains or the humidity is too high during mature period, it will produce cracks. Therefore, we must strengthen the control of powdery mildew. The chemical control method is: spraying 5 Baume degree lime sulfur agent before germination; 25% triadimefon 1500 times solution or 50% tumefa 600-800 times solution or 70% chlorothalonil 350-700 times solution in the onset stage, and Add 0.03% hide glue, spray control, once every 10 days, even spray 2-3 times. In addition, diseased leaves and diseased fruits need to be taken out of the orchard for centralized treatment. China Agricultural Network Editor
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