Pay attention to the prevention and control of grape diseases during Meiyu period
June grape into the young fruit growth period, at this time is in Meiyu period, high temperature and high humidity weather is conducive to the occurrence and spread of diseases. The main grape diseases include downy mildew and powdery mildew, which damage leaves, black pox, ear shaft brown blight, anthracnose and white rot, etc. When controlling, attention should be paid to selecting the right mixture of drugs, taking into account leaf disease and fruit disease. Generally, the drug is administered continuously for about 3 times, with an interval of 7~10 days. Before bagging in early June, spray Shigao 10% difenoconazole water dispersible granules (1000~1500 times solution) and 25% azoxystrobin suspension (2500 times solution). In the middle and late June, 80% mancozeb WP (600 times solution) plus 50% dimethomorph WP (1500~2000 times solution), or 70% thiophanate-methyl WP (1000 times solution) plus Cobo 78% pol? Manganese zinc wettable powder (400~500 times solution) or 80% Bordeaux mixture wettable powder (400~500 times solution) spray. If pest control is needed during disease prevention, 10% beta-cypermethrin suspension (3000 times solution) or 2.5% emamectin benzoate aqueous dispersible granules (2000~3000 times solution) can be added to the liquid medicine for spraying. Pay attention to alternate application, try to apply before rain. In case of continuous rainy weather, timely medication after rain.
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How to strengthen the management of the flowering period of grape planted in greenhouse
1. Pick your heart at the right time. The grapes planted in the shed should be reshaped by hedgerows, and the hearts should be picked early to control the growth. When the main vine grows to 60ml 80cm, the top accessory shoots are removed to leave winter buds, and the other secondary shoots are left with one leaf to pick the heart. 25 days later, when the apical winter buds germinated and grew 6 Mel 7 leaves, 5 leaves were left to pick the heart, and the apical accessory shoots were removed and the winter buds were left again.
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On the problem of sparse inflorescence of grape
1. The purpose of grape inflorescence thinning is to further adjust the yield on the basis of wiping buds and fixing branches, to achieve a reasonable plant load, to save nutrition, and to improve fruit setting rate and fruit quality in order to achieve the purpose of high quality and high efficiency. 2. The time of blossom thinning of grapes: when the inflorescences of new shoots can be clearly identified.
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