Dutch powdery mildew is a fungal disease. Pathogens damage leaves, vine vines and pods. At the later stage of disease, the diseased department had scattered small black particles. The victim's leaves soon yellowed and the leaves fell off. When the stems and stems were damaged, white patches appeared. When the stems were severe, the stems turned brown and the pods shrank. Control methods: Pay attention to clearing the sick plants in the field, strengthen the cultivation and management, ensure the plants grow robustly, and increase the disease resistance. In low-lying fields, sorghum deep-groove cultivation should be carried out, drainage and dehumidification should be well done, and vines should be introduced in time to prevent plant lodging. If infestation occurs, medication should be taken care of at the beginning of the disease. In the initial flowering period or the initial stage of disease, foliar spray benomyl wettable powder, polysulfide suspension agent sprayed once every 10-15 days, continuous spray 3 times, and pay attention to the alternate use of pharmaceuticals.
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