The main manifestations are the initial immersion in the edge of the heart leaves, odor, and distortion of the heart when severe. The reason is that the wounds caused by the two small pests in the seedling stage --- Swedish fly and the horse sucking (or sucking) the heart of the corn, cause the wound to be infected in the later period when the humidity is high, resulting in the rottenness of the corn.
Control methods:
(1) It is important to pay attention to the prevention and control of two small pests at the seedling stage, and spray the leaves 1500 times with 10% imidacloprid.
(2) At the beginning of the disease, using one of the following prescriptions to control the sprinkling of the heart and leaves may have a very significant effect. 20% Longketsu 500 times +10% Imidacloprid 1500 times + Love more than 4000 times or 1% Shenxicin 1500 times +15% acetamiprid 3000 times + Love more than 4,000 times.
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