July viticulture management points
At present, the grape is in the period of fruit enlargement, which gradually becomes mature. Within a month before harvest, it is a critical period for obtaining high quality and high yield. We must effectively grasp the management of fertilizer and water and prevent and treat diseases. First, strengthen fertilizer and water management (a) timely fertilization, supply nutrients. 1) It is usually top-dressed once during the fruit coloring period. It is dominated by phosphorus and potash fertilizers, and its fertilization amount accounts for about 1% of the whole year. Potassium sulphate three-element compound fertilizer can be used for soil application; it can also be sprayed by combining the prevention of pests and diseases through extra-root fertilizer, increasing the nutrition of leaves and fruits, and 0.5-1% potassium dihydrogen phosphate solution can be used for continuous spraying. 3 times. 2) In order to improve the storability of grapes berry, calcium fertilizer foliar fertilizer (such as Tricor calcium treasure 1000-1200 times) can be sprayed continuously within one month before harvest, which can significantly increase the calcium content of grape berries. , In order to improve the grape quality and calcium storage, it also has a certain role in the prevention of cracking. The application of calcium fertilizer to grapes has become an important technique in the cultivation of table grapes. (B) to strengthen the water management In order to ensure the quality of grapes, requiring strict control of irrigation within one month before harvest, to prevent the deterioration of quality. Before the advent of heavy rain, special attention should be paid to the prevention of flooding. For varieties that are prone to cracking, measures such as mulching and covering grasses should be adopted to maintain a balanced supply of soil moisture. Second, disease prevention and control. Grapes are susceptible to diseases such as downy mildew, black pox, anthrax, and white rot from the inflated to mature stage. While grasping the management of fertilizer and water in the field, it is imperative to do a good job of prevention and control of various diseases in a timely manner. 1. Downy mildew: It is most serious in our country from June to July. 78% Cobo or 80% essential wettable powder 500-600 times or 27.12% copper noble suspension can be used for prevention before or during the onset, and can prevent blackpox, anthrax and white rot at the same time. Occurs; 60% extinction WP WP or 600% or 72% urea Mn Zn wettable powder 500 times or 72% WP WP 600 times or 58% radomeril WP 500 times in the later and later stages Other drugs for prevention and treatment. 2, black pox, anthrax: high temperature and humidity conditions prone to occur, the prevention of pesticides can refer to the prevention and treatment of downy mildew; disease can occur after the use of 68.75% Yibao water dispersible granules 800-1000 times or 43% Halex suspension 3000 - 5000 times or 12.5% ​​of the WP wettable powder 1500 times and other agents for prevention and treatment. 3, white rot: initial hair in June, in case of July and August, more rain, typhoons more severe disease, especially the fruit into coloring to maturity, the degree of disease increased significantly. The preventive agent may refer to the prevention and treatment of downy mildew, and the therapeutic agent may refer to the prevention and treatment of black pox. 4, powdery mildew: high temperature and dry weather is conducive to the occurrence and prevalence of diseases, with serious occurrence from June to July, less incidence of late growth. Chemical control can be controlled by choosing 43% of Goodrich suspoemulsion 3000-5000 times or 10% of World High Water Dispersible Granule 1500 times. 5, gray mold: fruit coloring to maturity if the weather is hot and humid, often lead to serious head disease, especially in facilities cultivation to focus on prevention. The agent can be used alternately with 50% fluocin suspension 1000 times (prevention) or 40% Shijiale 800-1000 times or 50% naroli water dispersible granules 1000 times.
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