Soft rot is a serious disease commonly caused by Chinese cabbage, which occurs mostly in high temperature and high humidity conditions.
Causes
(1) Seed infection. The seeds of Chinese cabbage are directly sown without any treatment, and the soft rot pathogens attached to the seeds are easy to survive in the soil. When the temperature and humidity reach their growth conditions, the bacteria begin to multiply and spread.
(2) Heavy cultivation of infections. In the same plot, Chinese cabbage was grown year after year, and the accumulation of pathogens increased, and it spread rapidly under appropriate conditions. In addition, Chinese cabbage and sweet potato, rape, radish, spinach and other cruciferous vegetables can also cause "heavy sputum" and cause Chinese cabbage to be infected by pathogens.
(3) Improper cultivation methods. According to practical observations, the general Chinese cabbage cultivation is more serious than high ridge cultivation.
(4) Poor water management. On the watering, the large-water-immersed Chinese cabbage plot is more serious than the plots that are poured and poured less.
Prevention
(1) Seed sterilization: soak the Chinese cabbage seeds with 10% agricultural anti-120 (vegetable-specific) 120 times solution for 10 hours, or soak seeds with 15% mixed Amino Acid water agent (Manor Le) 100 times for 2 hours, and dry them. sowing.
(2) Soil disinfection: Mix 20% chloronitrobenzene powder with fine soil in a ratio of 1:20, or use 50% soil to sterilize insecticide net and fine soil to mix into the soil at a ratio of 1:30. Spread evenly on the finished seedbed and plant again.
(3) Drug control: When the Chinese cabbage seedling grows to 2 to 3 leaves, it is sprayed once with agricultural streptomycin every 5 to 7 days; or 80% 402 antibacterial agent is sprayed and prevented at the beginning of the disease.
(4) Treatment of diseased plants: In the process of cultivation and management, the diseased Chinese cabbage is removed, and the quicklime is sprinkled in the pit of the diseased plant to avoid the infection of the bacteria with water when watering or raining.
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