In recent years, the occurrence of grape rot in some areas has become increasingly serious. According to surveys, the causes of grape rot are: (1) Infection with germs. The main diseases causing grape rotten fruit are white rot, anthracnose, and black rot in special years; (2) Malnutrition, weakened tree vigor, partial nitrogen fertilizer, lack of potassium, calcium, trace elements, or excessive fruiting, Large amount of load, resulting in weak plant growth, reduced disease resistance; (c) humid climate, summer shearing is not timely, orchard depressed, poor ventilation and light transmission, excessive rainfall, excessive humidity in the soil and air, accelerated the disease Infection and spread. The main methods of prevention and control are as follows: 1. Completely remove the bacteria source (1) Remove the diseased body before the fall of the dendrite in the autumn, and burn it in a concentrated manner; (2) Spray 50-100 times liquid before the cold in autumn and after unearthing in the spring. Soolibal, or 3-5 degrees lime sulfur plus 300 times sodium pentachlorophenol eradication source, reduce the incidence; (C) timely removal of diseased leaves in season, disease, disease vines, concentrated deep. Second, to strengthen management (a) timely drainage after rain, loose soil, to prevent the park humidity is too large; (b) timely vines, picking up the heart, to maintain ventilation and light; (c) increase potassium, calcium and trace elements, Spraying plant growth regulators to improve leaf function, increase tree vigor, and increase disease resistance; (4) Control of production and reasonable burden. Determine the yield based on the growth of the plant. Orchard yield per year should be controlled at 2500-3500 kg. Third, the chemical control (a) on the ground to eliminate the bacteria source. For the orchard with severe disease in the previous year, before the occurrence of the disease (in early June), lime is applied on the ground (about 15 kg per acre); the soil with a higher PH value (pH above 7) can be grounded Sprinkle medicine (Fumei pair, sulfur powder 1 part, lime 2 parts, all three are mixed evenly, sprinkled on the ground, the amount of 1-2 kilograms of mu); or stand under Fumei double 500-600 times liquid, or 50% more bacteria Ling 500-600 times the liquid can control the initial infection of the pathogen from the soil overwintering; (b) spray protection. During the growing season, spray 1:0.5-0.7:200 Bordeaux mixture and spray once every 10-15 days to protect the leaves, branches, ears, etc. to reduce the chance of infection. (C) For the disease, the right medicine. In the event of diseases such as white rot and anthrax, they must be prescribed, but care should be taken to alternate the use of the agents. They should not be used as a single agent. After the fruit is stained, to prevent pesticides from contaminating the ear, it is possible to use 5008-times liquid 9281, or green milk copper 600-800 times liquid for control. China Agricultural Network Editor
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