What are the causes of chilli scabies? How to prevent and cure pepper scab?
Chili scab disease is also called bacterial spot disease. It is also common in various cultivation areas, which seriously affects the yield and quality of pepper. Scab disease not only infects pepper, but also harms tomato. 1. The pathogen and spread of pepper scab Capsicum scab is a bacterial disease caused by Xanthomonas campestris; Xanthomonas campestris can be wintered on the surface of the seed or overwinter in the field soil with the diseased body. The suitable temperature for the development of pathogens is 27-30 ° C. When the temperature is suitable in the second year, the plants will be infested with rain, irrigation water, wind, insects and farming operations. The germs invade from the stomata on the leaves of the plants or from the wounds of the fruits. 2. The incidence of pepper scab Chili scab disease, easy to develop under high temperature and high humidity conditions. The peppers grown in the open field are mostly in the July-August of each year, especially after the storm, it is very easy to form a peak incidence. 3. Symptoms of chili scab Scab disease can occur throughout the growth period of pepper. Scab disease mainly affects the leaves, stems and fruits of pepper plants. When the leaves are infected, they will initially form water-soaked spots. As the condition worsens, the edges of the lesions will bulge, the shape will be irregular, the periphery will be dark brown, the center will be light brown, and the surface of the leaves will be rough like a scab. If the diseased plaque occurs along the veins, it will often lead to leaf malformation. The leaves, leaf edges and leaf tips that are seriously damaged will often turn yellow and dry, and finally fall off. If the stem or the stalk of the pepper plant is ill, at the beginning of the disease, there will be a water-soaked, irregularly shaped streak, which will gradually turn into a dark brown color, and the ridge will be longitudinally split and appear as a scab. When the fruit is damaged by scab, the surface of the fruit will have a small black or dark brown bulge; as the degree of infection increases, the lesion will slightly bulge, and the lesion will be round or oblong, dark brown. Sore-like. 4. Prevention and treatment of pepper scab 1 Seed disinfection Before seeding, the seeds are pre-soaked in clean water for 10 to 12 hours, then immersed in 1% copper sulfate solution for 5 minutes, and then sown after being taken out. It can also be soaked in warm water of 52 ° C for 30 minutes, then transferred to cold water for cooling, and then germinated for sowing. 2 Strengthen management and implement 2 to 3 years of rotation; combined with deep tillage, to promote decomposition of diseased bodies and accelerate the death of pathogens; after planting, pay attention to cultivating loose soil, promote root development, and pay attention to drainage after rain. 3 pesticide control in the early stage of the disease and timely spraying of pesticides, the commonly used agents are 72% agricultural streptomycin soluble powder 4000 times solution, or neomycin 4000 ~ 5000 times solution, or 2% polymycin 800 times solution, or 60% DTM wettable powder 500 times liquid, or 14% copper ammonia aqueous solution 300 times liquid, or 27% copper high suspending agent 600 times liquid, or 78% wave·manganese zinc (Kebo) wettable powder 500 times liquid , or 40% bacterial crack WP 600 times solution, or 50% chlorobromoisocyanuric acid (antibacterial) soluble powder 1200 times solution, or 60% sulphur copper · Ethyl aluminum · zinc wet powder 500 times solution, Or "401" antibacterial agent 500 times solution, or 40% bacteria spirit 8000 times solution, focusing on spraying the base of the diseased plant and the surface, so that the effect of the drug solution into the cabbage heart is good. Spray once every 7 days, even spray 3 to 4 times. Dishwash Liquid,Dish Washing Soap,Dish Washer Detergent,Kitchen Dishwashing Liquid Detergent Wuxi Keni Daily Cosmetics Co.,Ltd , https://www.wxkenidaily.com