Pest control is an important part of grape production. In grape production, there are many pests that seriously affect the yield of grapes. In this regard, Zhang Juan for everyone to support the move: adhere to the "prevention-based, comprehensive prevention and control" principle, give priority to the use of agricultural control, physical control, biological control, scientific and rational use of chemical control. When using chemicals for prevention and treatment, according to the law of occurrence of pests and diseases, select the appropriate type of pesticides, the best period of control, and high-efficiency application techniques for prevention and treatment. At the same time, understanding the toxicity of pesticides and using selective pesticides will reduce the harm to humans, livestock, and natural enemies as well as the pollution to agricultural products and the environment. Powdery mildew is a common disease of "nuclear-free white" grapes. This is because the planting is too dense, improper fertilizer and water, poor ventilation and light transmission, too shady. Zhang Juan suggested strengthening management, conscientiously purifying the park, and maintaining orchard ventilation. At the beginning of the disease, lime sulfur, triadimefon, and diniconazole can be used for prevention and treatment. For grape root cancer, Zhang Juan thinks this is due to a mechanical injury to the vines that causes the invasion of the bacteria. Quarantine should be strengthened to implement disinfection of seedlings. A 3% solution of hypochlorous acid impregnates shoots and roots. Minimize wounds and rationally arrange the flow of irrigation water. When cancerous tumors were found, they were promptly excised and coated with lime sulfur and thiram. For grape felt disease, Juan suggested disinfection of seedlings. Clearing the garden in time, focused on burning the damaged foliage. Before spraying, 5 Baume degrees lime sulfur plus 0.3% detergent was sprayed to eliminate overwintering adults. The grapes are sprayed with 1000-fold impyrifos or 1000-fold dimethoate EC after leaf spreading. Can also be used Ling, tetrazine and so on. The physiological disease of the "non-nuclear white" grape is mainly sun burning disease. The reason is sunburn caused by high temperature, direct sunlight, and moisture metabolism. Zhang Juan suggested that scaffolding be used to increase the amount of leaves and prevent direct exposure of the fruit surface to strong light. Strengthen orchard soil moisture management. At the same time, the orchard can grow grass to reduce light reflections and effectively prevent sunburn. Zhang Juan also proposed prevention and treatment methods for sugar-free pods and grape leaf plaques of "nuclear-free white" grapes. Symptoms of sugar glycosides have a layer of “oily†substances on the surface of the victim's leaf. In severe cases, there is a layer of black “grey†on the surface of the fruit. Should be framed and cultivated reasonably. Can be scraped off eggs manually. After the grapes were unearthed and in mid-June, the nymphs were quarantined at a rate of 40% at 1500 times for active control. Grape leaf spot lice are the nymphs of nymphs and nymphs feeding on the back of the leaves to suck juice, and dense white spots appear on the front of the affected leaves. In severe cases, white spots grow into large plaques. To remove this, we must remove the orchard and surrounding weeds and miscellaneous trees. Grasp the prevention and control of the first generation of nymphs in mid-late and late May. The main drugs used were annihilation, 2000 times the killing of pine nut oil, or 2500 times the speed of extermination. Minimize the use of broad-spectrum insecticides to protect natural enemies.
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