What is pepper anthracnose?

What is pepper anthracnose? What method can be prevented and treated for pepper anthracnose? Please help to introduce that anthracnose is the main disease of hot pepper, which spreads quickly under the condition of high temperature and humidity, harms for a long time, and often causes great losses. Anthracnose can occur in the whole growth period of pepper. Anthracnose mainly harms leaves and fruits, and mature fruits and old leaves are vulnerable. The leaf was damaged, the leaf edge appeared nearly round watery brown spot, the middle of the disease spot was light gray, and there were small black spots in whorls (conidia disk). The fruit pedicel is damaged, resulting in brown irregular sunken spots, which are easy to crack when dry. After the fruit is damaged, it is easy to dry and shrink, and the disease spot is membranous and easy to break. The cause of anthracnose in pepper: the optimum temperature for the development of anthracnose was 27 ℃ and the relative humidity was about 95%. When the rainy season comes early and the temperature and humidity are suitable, the disease is easy to occur and epidemic. Germs invade from the wound and spread through wind and rain and prick-sucking mouthparts pests such as aphids and leafhoppers. High planting density, partial application of nitrogen fertilizer, poor drainage and poor ventilation and light transmittance will accelerate the epidemic of the disease. In summer, high temperature, drought and sunburn are serious, which is easy to aggravate the disease epidemic in the later stage. The source of truffles in continuous cropping land or incomplete field is abundant, and the disease is serious. There are great differences in disease resistance among varieties, and pepper is more susceptible to disease than sweet pepper. Prevention and control methods of pepper anthracnose: 1. Disinfection of pepper seeds: soak the seeds with 1204% pyrimidine nucleoside antibiotics for 12 hours, fish them out and dry them until semi-dry, and then sow them in cold water for 1 hour, then soak them in 55 ℃ warm water for 10 minutes, then cool them in cold water and accelerate germination. 2. 2-3-year rotation with wheat, corn and other Gramineae crops. 3. Prevention and control methods from planting management: reasonable close planting according to variety characteristics and fertilizer and water conditions; timely ventilation and moisture drainage in greenhouse to avoid high temperature and humidity; timely drainage after rain to remove diseased and residual plants in time; increase application of phosphorus and potassium fertilizer to improve plant disease resistance. 4. Adopt the method of chemical prevention and treatment: at the initial stage of the disease, 120% pyrimidine nucleoside antibiotic water agent 600 times, or 2% Wuyi nuclide water agent 200 times, or anthrax 80% Fu Fu zinc wettable powder 800 times, or 75% chlorothalonil wettable powder 600 times spray control, once every 10 to 15 days, continuous prevention and control for 4 times. Click to get more chili planting techniques click to get more vegetable planting techniques