How to prevent and cure ginseng root rot?

How to prevent and cure ginseng root rot? Please introduce the symptoms of ginseng root rot: it is mainly harmful to seedling roots and stems below the surface. The rotten ginseng root is dark brown and wet rotten, and it is rotten in the later stage, with only hollow root bark left. The shoot of the injured ginseng seedlings had no obvious symptoms in the early stage, and the leaves faded to yellow, wilted and died in the middle and later stage. The pathogen of ginseng root rot: the pathogen is Fusarium oxysporum and Fusarium. The hyphae of the bacteria are slender, colorless and septate. Large conidia are colorless, falcate, slightly curved, with 3-5 separations; small conidia colorless, unicellular, elliptic to oval; light brown, round, thick-walled chlamydospores can be produced on hyphae and large conidia. Incidence regularity of ginseng root rot: the pathogen overwintered with mycelia and chlamydospores, could survive in the soil for more than 3 years, and could spread through Rain Water, running water and bacteria-carrying compost. Fusarium oxysporum is mainly caused by wound invasion. After the invasion, the disease department produces new bacteria and carries on the re-infection to expand the damage. Ginseng root rot pathogen likes high temperature and high humidity, and the suitable temperature for growth and development is 2932 ℃. It mainly occurs in the high temperature and rainy season from July to August. The ginseng bed which is immersed in water, excessive humidity and poor drainage is easy to develop. It often causes ginseng roots to rot and ginseng seedlings die. The prevention and control measures of ginseng root rot are as follows: (1) apply organic fertilizer and biological agents to soil conditioning to inhibit the reproduction of bacteria. (2) pay attention to rain prevention, drainage and ventilation, maintain stable soil temperature and humidity, loosen soil and weed in time, and reduce soil consolidation in order to reduce humidity and increase soil temperature. (3) soil disinfection: use 99% carbendazim powder 10g / curtain + 50% carbendazim wettable powder 200g / curtain; or 3% evil? The soil was treated with 150 times solution of methyl water agent. (4) seed (planting) disinfection: seed was mixed with 2.5% fipronil (Shile) suspension seed coating agent 5 times 10 times liquid, and 50 times solution mixed with seed planting. Or soak the seeds in 600 times the solution of 50% carbendazim wettable powder. Drain after soaking to prevent frost injury. (5) the diseased plants were excavated in time, and the disease area was disinfected and isolated. The medicament uses carbendazim, doxorubicin and oxaliplatin. Methyl water agent and so on. Click to get more ginseng planting technology click to get more medicinal material planting technology