There are many reasons for grape cracking, which can be summarized as follows: First, the grape cracking fruit occurs in the upcoming harvest period. Some grape varieties have poor anti-swelling ability and are sensitive to ethylene, while the ethylene content in the fruit is close to maturity. High, so the fruit is easy to form cracked fruit; second, the fruit grows dry and rainless in the early stage, when the fruit matures, it is rainy or even rainy, and after such weather, it is easy to crack fruit after the high temperature and dryness; the third is the weak tree, but the fruit retention Large, the fruit is too close, it is easy to lead to severe fruit cracking; Fourth, more nitrogen fertilizer is applied; Fifth, the grapes on the sand land are easy to dry and drought, and the sharp external environment changes easily lead to cracking; The number of leaves is small, so that the ability of the tree to regulate water is reduced, and it is easy to cause cracking when it is rained;

Prevention and treatment methods of cracked fruit: 1 In the early and middle stages of fruit growth, pay attention to spraying water or watering. Thus, the dermal pores of the secondary epidermal cell wall and fruit stalk will be developed significantly, which can increase the critical swell pressure causing the fruit crack; for the ear and nearby leaves, Spraying naphthaleneacetic acid 15 mg/kg plus abscisic acid 100 mg/kg can increase the swell of the fruit and enlarge the fruit and prolong the life of the leaf. Try not to use or delay the application of ethephon ripening in the late growth stage. 2 Vineyards cover the mulch to prevent excessive accumulation of rainwater in the roots, inhibit evaporation of surface water and reduce soil moisture. When it is dry, the combination of mulching film and irrigation can effectively prevent grape cracking. If the amount of the Kyoho grape is too large, the fruit will be poorly colored and the fruit will be cracked. Therefore, it is necessary to adjust the amount of the result, and the tree will be fixed and the fruit will be reduced. 4 Apply appropriate amount of nitrogen fertilizer, increase phosphorus and potassium fertilizer, apply more organic fertilizer, and increase the amount of calcium fertilizer applied. 5 Change the traditional topping method and leave more leaves. All the above-mentioned secondary shoots of the ear are left with two leaves, and all the winter buds and summer buds between the secondary shoots are removed. It can reach more than 25-26 pieces of normal leaves per fruit branch, and enhance the function of tree body to regulate water.

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