Neglecting pest control after grape harvesting

After the grapes are harvested, they are susceptible to downy mildew, blackpox, brown spot, infestation of pests, leaf mites and other hazards. If they are not prevented or prevented, they will not only cause leaf decline, but also affect the growth of the tree and winter. It will also affect the growth of the second year. So, how to prevent and treat pests and diseases after grape harvesting?

First of all, the choice of drug. For pest control, systemic, high-effective, low-residue insecticides should be used; the disease should be prevented and controlled, and the fungicides with killing effect should be the mainstay.

Second, pest and disease control in general conditions. After the harvesting of the grapes is completed, the leaves of the branches, the diseased leaves and the diseased fruits, the damaged bagging, and the weeds in the garden should be removed. At the same time, grape leaves are vulnerable to downy mildew, powdery mildew, white rot, brown spot, etc., and a protective bactericide such as Bordeaux mixture 1:0.7:200 is used immediately after harvest, or 80 % Essential (Bordeaux liquid) 600 times liquid or 30% king copper suspension 800 times liquid and so on. After that, the copper preparation is mainly used once every 15 days. After the leaves are deciduous, the soil is sealed with lime sulfur 100 times to kill various pathogens.

Third, prevention and control of key pests and diseases. If downy mildew occurs during the harvest period, the downy mildew fungicide should be used 1 to 2 times immediately after the grape is harvested. For example, 80% must be 600 times liquid and +10% Grams (Morpholine Hydrochloride) 2000 times, or 80% Mandatory 600 Times + 80% Ethyl Aluminum Phosphate 400-600 Times, or Metalaxyl Manganese Zinc; or 80% Mandatory 600 Times Fluid + 50% Cream Urea cyanide 1500 times, and then the use of Bordeaux mixture, mancozeb, Fumei Shuang and other economically effective fungicides normal control.

Brown spot If there is much rain in the middle of the grape growth, a large number of brown spot pathogens will multiply and accumulate, creating conditions for the later occurrence. If the brown spot occurs after the fruit is harvested, first use 80% spray 800 times liquid +10% polyoxophospho 1500 to 2000 times, or 42% spray rich 600 times liquid +10% oxygen 1500-2000 times, or 80% mancozeb 800 times +10% dexamethasine 1500-2000 times, and then normal control with Bordeaux mixture.

Downy mildew and brown spot exist at the same time, first use of Cork 3000 times +10% polyoxophospho 1500 ~ 2000 times, and then normal control with Bordeaux mixture.

The main insect pests were found in the areas where the moths were found in the area of ​​80% of 400-600 times solution + 40% acephate, and were then treated with Bordeaux mixture. If there are many occurrences before and after flowering, an insecticide with strong absorption, high efficiency, and low residual is added after the fruit is harvested. Leafhoppers endanger serious areas, with 80% of the necessary 600 times +10% annihilation (Acetamiprid) 3,000 times; in areas where the spider mites are seriously endangered, 80% must be 600 times + acaricide; leafhoppers, spider mites harm In more serious areas, 80% of the necessary 600 times +40% acephate 800 times.

In addition, early prevention and control of defoliation should be done. There are three causes of early defoliation in vines: the occurrence of downy mildew, brown spot disease, and root problems. There are many kinds of early leaves caused by root problems: roots are immersed in water for a long time, root rot disease, root nematode disease and so on. The key to solving the problem of root immersion is to improve the drainage conditions; the treatment of rot disease can be combined with the method of watering amino acid liquid fertilizers and pesticides; root nematode diseases can be sprayed with nematicides.

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