Grape cob brown rot often occurs in the high temperature and rainy season in summer, especially in garden grapes, with poor ventilation and light transmission, and the incidence is more serious.
First, the symptoms
The disease mainly damages the cobs of grape young ears. After being damaged, it becomes brown, soft and dry, which leads to wilting and shedding of grains, resulting in a large reduction in yield.
Second, prevention
The first is to clear the sick, and collect and burn the sickness in time to eliminate the source of disease.
The second is to strengthen soil fertilizer management, increase tree vigor, and increase disease resistance. The proportion of N, P, and K is properly balanced and the input of calcium, boron, and potassium fertilizers is emphasized. Pay attention to drainage, reasonably trim, improve ventilation and light transmission conditions.
The third is chemical control. Spray before the onset or early onset to control the hazards of the disease.
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