First, the symptoms mainly damage the leaves. Grayish brown to gray-white, nearly round to irregular shape, usually smaller (diameter ranging from 1 to 4 mm, a few more than 5 mm in diameter). Spots appear grey to dark grey when wet.
Second, the prevention and treatment of this disease and anthrax often occur mixed, serious prevention and control of anthrax can also cure this disease, generally without separate control. In the field where the disease mainly occurs, in addition to the prevention and treatment of anthrax, it is also possible to spray 50% Doxeweed WP 1000 times, or 50% Sulfur Suspension 600x, according to Early prevention of disease, early treatment of disease, and mastery of plant closures, when the permeability between the fields begins to decrease, even if no disease or disease just emerged, hands-on spraying should be used to prevent and control the disease. The biggest role.
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