At present, the spring maize has been gradually heading and raising flowers. If the rainfall is high, the humidity is high, and the temperature is high, corn can easily infect large-spot disease. After the brown-strip-shaped long spots appear on the leaves, the premature death of the leaves will affect the development of corn kernels. As a result, corn grain is not full and the yield is significantly reduced. Therefore, we must step up prevention and control to protect the leaves. Specific prevention methods are as follows:
During the period of corn heading and flowering, in the event of rainy weather in a continuous day, it should be caught in an instant sunny day, spraying 3000-4000 times 30% difenoconazole aqueous solution or 600 times 20% aqueous copper thiazolyl solution, or 1500 times 33.5% quinoline copper aqueous solution, or 1000 times 41.6% copper hydroxide for prevention. After the rain, pay attention to the inspection of the leaves and found that there are light brown dry strips on the leaves when there are long spots, but also continuous spraying 2-3 times the above-mentioned fungicide for prevention and control, spraying once every 7-10 days. Spray all the leaves evenly to start dropping drops of water.
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