Red Globe grape summer disease control methods
How to control diseases in Red Globe grape cultivation in summer? Please provide an introduction to the control methods. Grape downy mildew, white rot, anthracnose and many other diseases have their peak incidence period in summer. The occurrence of downy mildew can cause grape leaf drop, withered branches, rotten fruit and even death. Therefore, in the rainy summer season, management of the Red Globe grape orchard should be strengthened, and...
How to control diseases in Red Globe grape cultivation in summer? Please provide an introduction to the control methods
The peak incidence period of grape downy mildew, white rot, anthracnose and many other diseases is in summer. The occurrence of downy mildew can cause grape leaf drop, withered branches, rotten fruit and even death. Therefore, in the rainy summer season, management of the Red Globe grape orchard should be strengthened to control diseases promptly.
Orchard sanitation: If disease occurs in the vineyard, since there is much rain at this time, the orchard should be cleaned at any time, and diseased leaves, diseased branches and diseased fruit should be removed from the orchard and deeply buried or burned. At the same time, weeds in the orchard should be removed promptly. When pruning diseased branches and diseased fruit, the scissors should be cleaned frequently and disinfected to prevent cross-infection.
Loosening the soil: In the rainy seasons of summer and autumn, especially after heavy rain or torrential rain, rainwater can 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 the plants susceptible to disease. Therefore, before rain or during a break in the rain, the soil should be deep-cultivated once promptly to improve the permeability of the orchard soil.
Treatment: During continuous overcast and rainy weather or high temperature and high humidity, grapes are most susceptible to disease. A comprehensive inspection should be carried out in the vineyard once every day. When 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 one grape plant, spray immediately.
Shoot management: Grapes should be pinched promptly, and lateral shoots should be removed promptly. At the same time, for plants with too many new shoots, some should be thinned out, which helps ventilation and light penetration and improves stress resistance.
Fertilization: Excessive rain often causes the loss of fertility in the orchard, leading to weakened tree vigor and reduced stress resistance. Therefore, in the rainy season, fertilization 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 "small amounts and frequent applications", applying fertilizer in small 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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