First, the symptoms of the disease Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
Cucumber blight is not only harmful to stems, but also to leaves and fruits. When the stem is damaged, there is a grease-like lesion near the node, which is oval or prismatic, grayish white, slightly concave, and secretes amber gum. When dry, the diseased part is shrunk and longitudinally cracked, and a large number of small black spots are scattered on the surface. The lesion spreads faster when it is wet, and the first half of the plant makes the upper part of the plant wilting and die, and the diseased part rots. The lesions on the leaves are nearly round, sometimes "V" shaped or semi-circular, pale brown to yellowish brown, with many small black spots on the lesions. The fruit is mostly infected in the flowering stage of the young melon, and the flesh is light brown and softened, showing heart rot. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
Second, the prevention and control measures Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
1. Seed disinfection before sowing, seed dressing with 0.3% Proton. Immediately after the onset of the disease, the following agents were used for spraying: 1, chlorothalonil (40% suspension) 600-800 times. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
2, methyl thiophanate (70% wettable powder) 800-1200 times. It is necessary to spray the whole field and spray once every 4-5 days for 2-3 times. Linyi Fertilizer Network Copyright
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