How to prevent and control diseases in Red Globe grapes in summer?
How to prevent and control diseases in Red Globe grapes in summer? Please give guidance. For Red Globe grapes in summer, the following methods can be used for disease prevention and control: 1. Clean the orchard: If disease occurs in the vineyard, and there is a lot of rain at this time, the orchard should be cleaned at any time, and diseased leaves, diseased branches, and diseased fruits in the orchard should be removed from the orchard and deeply buried or burned. At the same time, promptly remove...
How to prevent and control diseases in Red Globe grapes in summer? Please give guidance.
For Red Globe grapes in summer, the following methods can be used for disease prevention and control:
1. Clean the orchard: If disease occurs in the vineyard, and there is a lot of rain at this time, the orchard should be cleaned at any time, and diseased leaves, diseased branches, and diseased fruits in the orchard should be removed from the orchard and deeply buried or burned. At the same time, promptly remove weeds in the orchard. When pruning diseased branches and diseased fruits, frequently clean the scissors and disinfect them to prevent cross-infection.
2. Loosen the soil: In the rainy seasons of summer and autumn, especially after heavy rain or torrential rain, rainwater will cause the surface of the vineyard soil to become compacted, resulting in poor soil aeration, which causes the grape roots to lack oxygen, weakens the tree vigor, and reduces stress resistance, making them more susceptible to disease. Therefore, before rain or in the intervals when rain stops, promptly carry out one deeper tillage of the soil to improve the permeability of the orchard soil.
3. Treatment: During continuous overcast and rainy weather or high temperature and high humidity, grapes are most susceptible to disease. A comprehensive observation should be made in the vineyard once every day, and as soon as disease is first seen, spray the appropriate pesticide immediately. For example, for downy mildew, if disease is found in any individual spot in the orchard, even on just 1 grape plant, spray immediately.
4. Clear the shoots: Pinch the grape vines in time and remove lateral shoots in time. At the same time, for plants with too many new shoots, thin out a portion, which helps ventilation and light penetration and improves stress resistance.
5. Fertilization: Excessive rain often causes the loss of orchard fertility, leading to weakened tree vigor and reduced stress resistance. Therefore, in the rainy season, fertilizer should be applied at the appropriate time according to the fertility loss of the vineyard soil and the growth of the grapes. Fertilization should follow the principle of "eat less, eat more often," applying fertilizer in smaller amounts and frequently; foliar topdressing is generally carried out together with pesticide spraying, and it is best to spray a high-efficiency fruit foliar fertilizer separately.
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