First, the occurrence of soft rot characteristics Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
Soft rot occurs mostly in the cabbage core period, and begins to produce water-stained lesions on the base of the cultivar or shortened stems, which expand from the outside to the inside, and sometimes the short stems rot and spread from the inside to the outside. In the early stage of the disease, the outer leaves are wilting, and they can return to normal in the morning and evening. With the development of the disease, the outer leaves are drooping, the leafballs are bare, the base is rotten, the tissue sticks to slippery soft rot and emits a foul smell, which is called “rotten sputumâ€. When it is serious, the whole plant dies. In low-lying areas, plants with long growth and weak growth are prone to disease, and plants with many insects and many wounds are seriously affected. Diseases generally develop in parenchyma, sometimes into vascular bundles, and extend to the whole plant through stems and veins; lightly pathogenic plants, pathogens lurk in tissues, causing rotten sputum during storage. The Chinese cabbage is damaged, and the early onset can cause the whole plant to rot. The late onset often causes the stalk to rot without convulsions, and even dies in the middle. Inadequate management, improper irrigation or long drought and no rain, as well as pests and pests are more serious. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
Second, agricultural control measures Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
Soft rot is a bacterial disease that is primarily invaded by crop wounds. Such as mechanical damage caused by transplanting cabbage, insect damage caused by underground pest damage, trauma caused by cultivating by cultivating or other reasons, "burn" caused by excessive application or concentration of fertilizer, these wounds are the passage of bacteria into the interior of the plant. . Therefore, the prevention and control of soft rot of Chinese cabbage should be based on the selection of resistant varieties, the implementation of wide and narrow ditch, and the control of nitrogen fertilizer, to prevent the disease from getting hurt. Use nutrient seedlings, or wet the seedbed soil before transplanting, and transplant soil with soil to reduce root damage. When the farming operation is carried out, mechanical damage should be avoided as much as possible. When applying and fertilizing, it should be strictly proportioned. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
Third, chemical control measures Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
Control the larvae of the diamondback moth and the night moth, reduce the wound and reduce the incidence of soft rot. The diseased plants were found to be immediately removed and destroyed, and lime powder was disinfected in the diseased cavity. In the early stage of the disease, the agricultural streptomycin 500 times solution, the 72.2% Plex water-soluble liquid agent 800-1000 times solution or the 47% ruinong wettable powder 800-1000 times solution is sprayed on the ground, and the base of the robust plant or the root is sprayed. Once every 5-7 days, 2 to 3 times in a row. Linyi Fertilizer Network Copyright
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