The diseases of the roots of peppers often cause the death of peppers. In severe cases, they die, and even die. There are three major root diseases of peppers, namely, the diseases of pepper, root rot and bacterial wilt. According to the survey, 80% of diseases in root diseases, 5% of root rot, and 15-20% of bacterial wilt occur in the diseases of pepper roots. From the trend of incidence in recent years, the proportion of bacterial wilt disease has gradually increased. Seen from the site of the disease, the disease mainly occurred at the base of the stem above the ground surface, resulting in water-stained lesions in the initial stage, large lesions of 7-10cm after expansion, and blackish-brown lesions in the late stages. The cortex was softened and decayed, and the stems contracted. Root rot occurs below the surface and near the ground. It is mainly the rot of the plant's skin that is easily peeled off. Bacterial wilt occurs at the root tip, causing the vascular bundle to turn brown. The prevention and control of chili root disease should be mainly prevention and prevention and control. To start from seedling raising, to control all aspects, and to use drugs, you can get a multiplier effect. 1. Seedling Bed Soil Disinfection Treatment Greenhouse pepper is raised in September at a temperature of 25-28°C. It is the onset of root disease that must be properly treated. The seedling bed soil was selected for 2 years without the planting of eggplant vegetables in the field soil. After the seedbed is in good condition, 10 g of medicine is prepared per square meter of bed area. 70% EB-Zn WP for epidemic diseases, 50% carbendazim WP for extremely rot, and 70% dt WP for bacterial wilt. Respectively, according to the area of ​​the seedbed, take the medicine and mix it. Add 1kg of dry fine soil and mix it. Then sprinkle it on the surface of the hoe, cut the hoe and flatten it, then water it, sprinkle the seed, cover the soil, and cover the film. This can prevent the occurrence of these three kinds of diseases and seedlings. 2. Sub-seedling seedbed soil treatment according to the seedling size of the entire seedling seedlings, and then with each square meter with more than 3 kinds of powder 10g, and then mixed with 10 times the dry fine soil, sprinkled in the whole seed bed, the same plan锄 æ‚ æ‚, æ‚ ã€ ã€ ã€, then according to the spacing requirements of the ditch, pouring enough water, the water is not infiltrated immediately when the seedlings, soil cover, cover film. 3. During the colonization, the application of acupuncture points in the greenhouse is usually completed in late January. Before planting, 0.5 kg of manganese phosphorus zinc, 0.5 kg of carbendazim, and 0.5 kg of carbendazim are mixed. After mixing, 15 kg of dry fine soil is mixed. . When planting, spread the medicine evenly into the planting hole. In general, a medicine soil can be sprinkled with 4 points. After spreading, it can be planted and watered. 4. The application of heavy-duty sheds in the whole area is relatively heavy on the heavy land masses. If possible, it is best to turn it over. If it is not, it is necessary to deepen the sun on the one hand, increase the application of organic fertilizers to increase the resistance of the plants, and on the other hand, apply pesticides throughout the shed to prevent them in advance. The variety of its medication is the same as above, and 10g per square meter is calculated according to the cultivated area. After deep-leveling before planting, add 10 times the amount of fine dry soil to the ground and spread it evenly on the ground plane. The entire greenhouse application also applies to severely affected land. 5. Irrigating roots at the early stage of disease prevention and control Every year from late March to April, is the peak period of the incidence of pepper root disease. At this time, according to the number of peppers, use the above three kinds of medicines, respectively, according to the amount of 500 times with good irrigation. A little piece of diseased seedlings and surrounding seedlings were poured into the roots at 0.5 kg each, and the rest was filled with 0.2-0.3 kg of liquid per hole. Once a day for 10 days, irrigation is repeated for 2 times. After irrigation, watering is not provided temporarily, which can basically control the spread of diseases.
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