How to manage late grapes in summer

The use of fertilizers should be increased in the management of late-maturing varieties, and the fertilizer varieties should be mainly applied with phosphorus and potassium fertilizers. In terms of fertilization method, in addition to root topdressing, attention should be paid to topdressing foliar fertilizer. Under normal circumstances, 25-30 days before harvest, 15-20 kg of phosphorus and potassium fertilizers are applied per mu, and potassium dihydrogen phosphate is applied 2 to 3 times per mu. At the same time, for some varieties that are difficult to color, consider laying reflective film to increase the amount of light. From the perspective of fruit edible safety, attention should be paid to the safety period of pesticide use, and medication should be stopped 20 days before grapes are on the market. At the same time, we must do a good job in preventing bird damage.

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