Significance and methods of pest control after grape harvesting

First, the significance of pest control after grape harvesting

The control of pests and diseases after grape harvesting is an important part of the whole pest control of grapes, but it is often ignored by some producers. It is considered that the grapes have been collected and the banknotes have been put into the Bag. At this time, the pests and diseases are not important. it's not true.

First, after the fruit is harvested, the leaves continue to undergo photosynthesis to produce nutrients. The nutrients produced at this time mainly turn to the nutrients that supply the old branches, flower buds, and roots. Old shoots are the basic conditions for the safe wintering of grape branches; flower bud differentiation is the basic condition for the complete and healthy flower buds; root growth and nutrition are related to the growth of grapes in the second year before flowering. Therefore, after harvesting the grape fruit, the grape leaves should be preserved as much as possible, the time of photosynthesis should be prolonged, and the leaves should be made more nutritious, providing "invisible" growth. After harvesting grapes, it is prone to downy mildew, black pox disease, brown spot disease, insect pests, leafhoppers and other hazards. If they are not controlled or poorly controlled, they will not only cause premature defoliation of leaves, but also affect the growth and wintering of the year. And it will affect the growth of the second year. Therefore, the prevention and control of pests and diseases in this period has become an important measure for leaf protection, which is to lay the foundation for ensuring the second year of high yield.

Secondly, the prevention and control of pests and diseases after grape harvesting is conducive to reducing the wintering base of pests and diseases, laying the foundation for pest control in the second year. Otherwise, it will lead to an increase in the number of pests and diseases over the winter, which will increase the difficulty of prevention and control in the second year and increase the cost of prevention and treatment.

Second, the method of pest control after grape harvesting

Pharmacy selection: pest control, use of systemic, high-efficiency, low-residue insecticides; prevention and treatment of diseases, mainly with fungicides with killing effect. In general, a protective fungicide should be used immediately after harvesting: use a 1:0.7:200 solution of Bordeaux mixture, or 80% of the necessary 600 times solution or 30% of the king copper suspension agent 800 times solution. In the future, the copper preparations are mainly used once every 15 days, and the Bordeaux mixture, essential, and king copper can be selected.

Prevention under special circumstances:

1. Downy mildew is common: first use 80% essential 600 times liquid + Cork 2000 times liquid (or 80% essential 600 times liquid + 80% ethyl phosphorus aluminum 400-600 times liquid); or metalaxyl Manganese-zinc; or 80% essential 600 times liquid + 50% cyanoguanidine 1500 times liquid, and then normal use of Bordeaux mixture.

2, brown spot disease is common: first use 80% spray 800 times liquid + 10% polyoxymycin 1500-2000 times liquid; or 42% spray rich lotion 600 times liquid + 10% polyoxymycin 1500-2000 times Liquid; or 80% mancozeb 800 times solution + 10% polyoxomycin 1500-2000 times solution, and then use Bordeaux mixture for normal control.

3, downy mildew and brown spot disease generally occur: first use Cork 3000 times +10% polyoxymycin 1500-2000 times liquid, and then use Bordeaux liquid for normal control.

4, black pox disease generally occurs: first use 12.5% ​​diniconazole 3000% times solution (or 10% difenoconazole 1500 times solution) + 80% essential 400 times solution. Then use copper preparations, such as Bordeaux mixture, essential, Wang copper and other normal control.

5, Tiger Tianniu, the number of the winged moth is high: the garden with a high base of the tiger's beetle must use a systemic, high-efficiency, low-residue insecticide after harvesting the grapes; the winged moth, such as before the flower If there is a lot after flowering, the fruit should be supplemented with a systemic, high-efficiency, low-residue insecticide. For the prevention and control of two insect pests, first use 80% essential 400-600 times liquid + 40% acephate, and then use Bordeaux liquid to prevent it.

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