Corn leaf spot control measures
Generally, the amount of rainfall in July was positively related to the incidence of leaf spot disease. When the diseased plant rate reached 70%, the diseased leaf rate began to develop from bottom to top; the rainfall was early, the rate of diseased plants rose early, and vice versa. . When the diseased plant rate is 70% and the diseased leaf rate is 20%, an outbreak occurs in about 15 days after a moderate to heavy rain. When the diseased plant rate is 100% and the diseased leaf rate is 30%, it will be prevented and treated again when it encounters rainy weather. First remove 1-2 pieces of diseased leaves from the bottom of corn and destroy them; spray 50% carbendazim or 70% thiophanate 500 times, or mancozeb 800 times.
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