What are the main symptoms and prevention methods of corn gray spot disease?
Symptoms: The disease mainly occurs in the leaves, leaf sheaths, and temporal lobes of mature corn. In the early stage of the disease, water-stained light brown spots gradually expand into light brown stripes or irregular gray-to-brown slivers. These brown spots extend in parallel with the veins, the lesions are gray in the middle, and the lesions are on both sides of the leaves (especially on the back). ) Can produce a gray mold layer, that is, the conidiophores and spores of pathogens
Control methods: 1 After the maize is harvested, remove diseased residues such as corn stalks in a timely manner to reduce the sources of initial dipping in the field.
2 Promote the cultivation of disease-resistant varieties.
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