In the summer, we must control various diseases of grapes, including powdery mildew, gray mold , downy mildew and so on. For the different diseases, the corresponding pesticide fungicide should be selected for prevention and treatment.
First, take the prevention as the mainstay and spray the medicine in time. For drugs with a residual effect of 17 to 21 days, the drug is usually sprayed every 15 days. If there is rain in the middle, depending on the amount of rainfall, shorten the number of days of spraying as appropriate. If there is heavy rain after spraying, spray it again after the weather. If the two adjacent drugs are alkaline or acidic, strict attention should be paid to the interval to prevent neutralization of the two drugs.
Second, see the initial onset of the disease, timely treatment. Grapes are most susceptible to disease when the rain is heavy, and the temperature is hot and humid. To do this, you should go to the vineyard every day. Symptomatic spray when you see the disease. For the prevention and treatment of downy mildew, the new high-fat film 800 times solution can be sprayed with 70% of the Co beater 600 times solution and 80% of the ethyl aluminum phosphate 300 times solution.
Third, the main high-lipid film, adapt to other drugs. In the process of preventing disease against grapes, it is necessary to use new high-fat membranes and adapt to other medicines, and the disease prevention effect is better. A new high-fat film + strong fruit timing can be sprayed before flowering, young fruit stage and fruit expansion period to increase the nutrient delivery. Anti-falling flowers, fruit drop, cracked fruit, stiff fruit, and deformed fruit make the fruit colorful, fruity and taste good. After the grape is harvested, a 500-fold liquid new high-lipid film is sprayed to restore the physiological physiology of the plant, and the plant is restored to growth. If white rot, anthrax and other diseases occur in the middle, it can be symptomatic. If the grape has powdery mildew, you can choose to use the fungicide acetaminophen for prevention and treatment.
5. Temporarily loosen the soil and increase soil permeability. In the rainy season, after heavy rain and heavy rain, the surface of the vineyard will be knotted, and the soil will be poorly ventilated, resulting in the lack of oxygen in the roots of the grapes, weakening of the tree, reduced resistance, and easy disease. Therefore, in the rainy season, it is necessary to grasp the gap time of no rainy days. For the cultivating of the vineyard, spraying new high-fat film in time can prevent the soil layer from squashing, so as to increase the permeability of the soil, isolate the source of the pests and destroy it by suffocation.
Sixth, clean the secondary tip to facilitate ventilation and light. During the rainy season, the grapes are the most prolonged, and the incidence of secondary shoots is very high. It is necessary to spray the flower king No. 3 in time to make the plant nutrient reflux, inhibit the main shoots from mad, without artificial topping buds and hormone killing, it can inhibit the main shoots, axillary buds, and side by side, and transform the growth nutrition into reproductive nutrition. Promote flower bud differentiation and improve the quality of pollen fertilization. More flowering, more fruit, anti-drop fruit, promote development.
Seventh, timely clearing the garden to curb the spread of the source of the disease. The environment with high temperature and humidity is conducive to the spread of germs. Therefore, it is necessary to clear the garden at any time, and remove the diseased leaves, diseased branches and diseased fruits in the garden, and bury them or burn them. At the same time, the whole park sprayed the tree guard general for sterilization.
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