How to prevent greenhouse pepper root disease

The root disease of pepper often causes the dead seedling of pepper. In severe cases, it is dead or even harvested. There are mainly three kinds of root diseases of pepper, namely pepper disease, root rot and bacterial wilt. According to the survey, in the root disease of peppers, the disease accounts for 80%, root rot accounts for 5%, and bacterial wilt accounts for 15-20%. From the trend of recent years, the proportion of bacterial wilt is gradually increasing. From the point of view of the disease site, the epidemic mainly occurs at the base of the stem above the surface of the earth. The water-stained lesions are formed at the beginning, and the large lesions are 7-10 cm after expansion. The diseased part becomes dark brown, the cortex softens and rots, and the stems contract. Root rot occurs below the surface of the earth, near the surface, mainly because the epidermis of the plant is rotten and easily peeled off. Bacterial wilt occurs at the root tip, causing the vascular bundle to brown. The prevention and control of pepper root disease should be based on prevention and prevention and treatment. It is necessary to start from the seedlings, take all the links, and use the medicine to get more results with half the effort. 1. Disinfection treatment of seedling bed soil. When the greenhouse pepper is raised in September, the ground temperature is at 25-28 °C, which is the time of the disease of the root disease. Soil treatment must be done. The seedling bed soil is selected from the field soil of the solanaceous vegetable that has not been planted for 2 years. After the seedbed is well prepared, it is prepared according to the seedbed area of ​​10 g per square meter. The disease uses 70% ethyl phosphorus manganese zinc wettable powder, 50% carbendazim wettable powder for extreme rot, and 70% dt wettable powder for bacterial wilt. According to the area of ​​the seedbed, weighed the mixture and added 1kg of fine soil to mix it. Then we sprinkle it on the surface of the bowl, slash it, flatten it, then water it, sprinkle it, cover the soil, and cover the membrane. This can prevent the occurrence of these three diseases and the seedling stage. 2. The soil treatment of the seedling seedling bed is divided into seedling seedling beds according to the size of the seedlings, and then 10 g of the above three kinds of powders are respectively distributed per square meter, and then mixed with 10 times of dry fine soil, and sprinkled on the whole seedbed, and the same锄, 搂平, and then ditch according to the spacing of the plant spacing, pouring enough water, immediately planted seedlings, covering soil, cover film when the water does not seep. 3. When planting according to the point of application, the greenhouse is suitable for planting in the greenhouse in the late January. Before planting, prepare 0.5 kg of phospha-manganese zinc, 0.5 kg of carbendazim, dt 0.5 kg per 1000 wells, mix and add 15 kg of dry fine soil and mix. . When planting, spread the soil evenly into the planting hole. Generally, a potion can be used to sprinkle 4 holes, and then planted and watered after being sprinkled. 4. Repeated application of the whole shed for the heavy dams, the relative incidence is heavier, if possible, it is best to rotate. If it is not, on the one hand, it is necessary to deepen the soil, increase the application of organic fertilizer, and enhance the resistance of the plant. On the other hand, the whole shed is applied and prevented in advance. The variety of its medicine is the same as above, and 10g per square meter is calculated according to the cultivated area. After deepening and leveling before planting, add 10 times of fine dry soil according to the amount of the drug, spread evenly on the ground plane, and flatten after scribing. The same pharmacy application is equally applicable to seriously ill plots. 5. In the early stage of the disease, the root canal control period is from the end of March to April, which is the peak period of pepper root disease. At this time, according to the number of peppers, the above three kinds of medicines should be mixed according to the amount of 500 times and then rooted. The seedlings of the diseased plants and the surrounding seedlings were filled with liquid medicine at a root of 0.5 kg per plant, and the rest were irrigated with 0.2-0.3 kg of liquid per hole. Once every 10 days, even if it is poured twice, the water will not be watered after the root irrigation, which can basically control the spread of the disease.

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