In July, the grapes entered the hard core of the berries until the color change period. The main pests and diseases in this stage were powdery mildew, anthracnose, white rot, downy mildew, spider mites, scale insects, and chafers. The recent sweltering and rainy weather is conducive to the occurrence and spread of diseases. Although large-scale production of grapes is carried out for bagging, it has a preventive effect on reducing pests and diseases, but it is still necessary to do a good job in pesticide control to ensure high quality and high yield of grapes.
According to the characteristics of the recent climate and the occurrence of grape pests and diseases, it is currently necessary to focus on the prevention of leaf diseases and fruit diseases, and to treat pests, and to use 3 medicines, and control them every 10 days depending on the weather. For the prevention and treatment of diseases, for the first time, you can use 33.5% quinoline copper suspension (1500 times liquid) plus 50% carbendazim wettable powder (500 times liquid) or 80% Bordeaux liquid wettable powder 400-500. Double liquid spray; the second time with Baitai 60% azole ether · Daisen water dispersion granules (1500 times liquid) plus Fuxing 40% fluorosilicone emulsifiable concentrate (8000 times liquid), or Cobo 78% Boer · manganese Zinc wettable powder (400-500 times solution) plus ampicda 2% azoxystrobin suspension (1500 times solution) spray; the third time with spray 80% mancozeb wettable powder (500 times solution) Add 70% thiophanate-methyl WP (700 times solution) spray. To control pests, add insecticide according to the occurrence of pests in the field at each application. You can choose to annihilate 10% beta-cypermethrin EC 3000 times, Zunkui 2.5% emamectin benzoic acid brine dispersion granules 1500 times , chlorhexidine 0.6% avermectin EC 1500 times solution. Pay attention to controlling the concentration of the drug, alternately rotate the drug, and stop the drug 10-15 days before harvesting.
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