Eggplant verticillium wilt is a soil-borne disease of spring-planted eggplant in greenhouse. In recent years, due to the continuous cropping of eggplant in greenhouses, the verticillium wilt has been aggravated year by year. Generally, the incidence of light disease fields is reduced by about 20%, and that of severely ill fields is reduced by 40% to 50%. symptom The bud stage begins to be common. The middle and lower leaves of the plant are chlorotic and yellow by the veins or leaf margins, and gradually develop to the yellow leaves of the half leaves or whole leaves, and the leaf margins are slightly upward, sometimes only half of the leaves. At the beginning of the disease, the plants wilted at noon on sunny days, and recovered in the early, late or rainy days. The leaves are withered and the plants are only left with light stalks or heart leaves, and the fruits are rigid and stop growing. Cut the roots, stems, branches and petioles, etc., showing that the vascular tube is yellowish brown or dark brown. Law of onset It is caused by fungal infection, generally in the temperature of 20 ~ 25 ° C, when the humidity is heavy and rainy, the pathogen is inhibited when the temperature is above 28 °C, and the greenhouse eggplant is the first 5 to 6 leaves. In addition, low-lying terrain, soily and heavy, saline, long-term continuous cropping, low ground temperature, fixed roots, and flood irrigation can accelerate the occurrence and spread of Verticillium wilt. Control method 1 use resistant varieties. 2 Seed disinfection, soaking seeds with 50% carbendazim WP 500 times for 2 hours before seeding, or 50% captan WP with seed weight 0.2%. 3 bed soil disinfection. Each 667 square meters is mixed with 50% carbendazim WP or 50% carbendazim WP 3 to 4 kg and 10 times dry fine soil, evenly spread on the ground, squatting 15 cm. 4 Reasonable rotation. Rotating with non-solanaceae crops for more than 3 years, such as onions, garlic, rice, etc. 5 Strengthen field management. Formulated fertilization, 5000kg per 667 square meters of fermented manure, 30kg of N, P, K and other mixed fertilizers as base fertilizer. The mulch film is mulched, the water is controlled in the early stage, and the cultivating is strengthened. In the end, the potassium and nitrogen fertilizers are added, and the topdressing and foliar fertilizer are applied in time. 6 chemical control. In the early stage of the disease, the diseased plant is burned out at the same time, and the root is filled with 70% methyl thiophanate WP 800 times solution, 50% carbendazim WP 500 times solution or 50% carbendazim WP 500 times solution. The plant is filled with 0.3 to 0.5 kg of the drug solution, and is inoculated once every 10 days, and is continuously irrigated 3 to 4 times. Foshan Ja Suo Medical Device Co., LTD , https://www.jasuodental.com
