November 06, 2018
The main diseases of autumn cabbage
Cabbage Downy Mildew: Polygonal or irregularly shaped lesions appear on the diseased leaves, yellow-green to yellow-brown, white moldy on the back, and leaves yellow when heavy. Control methods: At the beginning of the disease, spray 25% metalaxyl WP 800 times, or 75% chlorothalonil wettable powder, 70% Mancozeb WP, 64% antivirus WP 400-500 Diluent, or 40% EB aluminum wettable powder 200 times to 300 times liquid. Cabbage Viral Disease: The locust is mainly used as a transmission medium. When cabbage occurs, the leaves appear veins, mosaics, shrinkage, distortion, necrotic spots, streaky streaks, deformities and other symptoms, from the seedling stage to the heart-packing period. Can feel sick. In particular, 6 to 7 seedlings of the seedlings were sensitive to the disease. Control methods: In the early stage of disease, spray 20% virus A WP 500 times solution or 15% plant disease Ling emulsion 1000 times, spray once every 10 days, and even spray 2 or 3 times. Cabbage soft rot: Occurs from the cabbage rosette period to the heart of the cabbage. It is generally wounded by the wounds of the base of the vegetables, and it is initially water-stained. It expands and turns light brown. The tissues are soft and stench and have bad smell. Control methods: In the early stage of disease, spray 100-150ppm of agricultural streptomycin, spray once every 7 days to 10 days, and spray 2 to 3 times. Or spray neomycin with 3000 times solution.
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