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Grapes are common in life and can supplement the trace elements needed in the body. In the process of grape planting, grape cob brown blight is a common disease. This article will introduce the method for controlling the brown colt of grape cob, for your reference.
Common diseases of grape are: grape cob brown blight, gray mold, powdery mildew, anthracnose, black pox disease, white rot, sunburn and many other diseases, how to prevent the grape cob brown blight of:
The brown blight of grape cobs mainly harms the young flower buds, cobs or young fruits, causing them to shrink and dry up, causing a large number of fallen flowers and fruits. Generally, the yield is reduced by 10%-30%, and in severe cases, the yield is reduced by more than 40%.
According to Wu Weimin, an expert on fruit trees research at the Institute of Horticulture of the Provincial Academy of Agricultural Sciences, high humidity is the main cause of the bacterial brown blight of grape cob. The occurrence of low temperature and rainy weather from early May to mid-June is conducive to the infection of pathogens. The flowering period is prone to the spread of low temperature and rainy weather. Vineyards with low terrain, excessive watering, poor ventilation and ventilation, extensive field management, insufficient fertility and weaker trees are more serious. Jufeng is a susceptible disease variety, and new roses, longan, rose dew and other varieties are more resistant to disease. When the fruit grows to the size of the soybean, the disease stops infesting.
The following measures can be taken to control the brown colt of grape cob.
First, clear the garden in time. Remove diseased stems, diseased fruit, concentrate destruction, and reduce the source of overwintering bacteria.
The second is to smear the whole shoot. Timely germination, topping, pruning fruit branches, improve ventilation and light transmission conditions.
The third is rational fertilization. Add organic fertilizer and phosphorus and potassium fertilizer, control nitrogen fertilizer, and enhance plant disease resistance.
The fourth is to clean up the ditch system. Open up a set of furrows to reduce the humidity in the rainy days.
The fifth is pesticide control. After the germination of the grape buds, the stone sulphur mixture is used to focus on the mother branches and eliminate the overwintering bacteria source. After the grape leaves are fully unfolded, use the 25.5% isobacteria foliar spray to dilute 800-1000 times solution, or 40% pyrimethanil chlorothalonil leaf spray to dilute 800-1500 times solution, 60-100 ml per acre. Or 40% pyrimethanil chlorothalonil leaves spray diluted 800-1500 times solution, 60-100 ml per acre.
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