Pepper anthracnose, also known as hot pepper, is the main disease of pepper, which is widespread and seriously damaged. Under the conditions of high temperature and high humidity, the spread of the epidemic is rapid, and it takes a long time to damage, and the damage is heavy. Apart from harming peppers, the disease also harms tomatoes and eggplants. First, the symptoms can be affected from the seedbed to the transplant, which mainly damage the leaves and fruits, especially the mature fruits and old leaves are more vulnerable. The leaves were damaged. The margins of the leaves were water-stained brown spots, nearly circular and pale gray in the middle. There were round black dots on the leaves, which were the spore plates of the pathogen. The fruit stems suffer damage, resulting in irregular spots with brown irregularities that are easy to crack when dry. In the mature stage, the disease resistance of the plants is poor. Under the conditions of heavy rain or high temperature, the fruits are vulnerable, the lesions are brown, the water-stained circle forms irregular spots, many black dots are produced on the upper round, and the periphery has moist discoloration. ring. After the fruit is damaged, it is easy to shrink, the lesions are filmy, like skin paper, easy to break. Second, the cause of the disease Varieties of hot pepper varieties are less resistant than sweet peppers. In recent years, the varieties are variegated, degraded, and also an important cause of disease epidemics. The planting of barnyardgrass is planted year after year, the accumulation of pathogens is fast, and the base number is high. Once the conditions are suitable, the disease will quickly expand and spread. Elimination of diseased leaves, diseased fruits, and incomplete debris make bacteria spread continuously through the wind and rain. Even if there is a new earthworm, as long as pathogens are present and the conditions are appropriate, the outbreak and epidemic of disease can be caused. Seedbed management is unscientific, that is, it does not carry out sterilization treatment of seed chemicals, soil disinfection, and infection under seedlings in high-temperature countries and high-humidity conditions. After moving into the field, it can continue to harm. The pathogens invade from wounds, and are transmitted through wind and rain, airflow, and sucking pests such as locusts and fleaes. Disease conditions The germ development temperature is 12-32°C, the suitable temperature is 27°C, and the relative humidity is about 95%. Early in the rainy season, suitable temperature and humidity are also important reasons for the occurrence and prevalence of diseases. The number of repeated infusions is high. Under appropriate temperature conditions, the relative humidity is 87%-95%. The incubation period of the bacteria is only about 3 days. The number of infections is frequent and the pathogen accumulation is rapid. In a short time, it can cause a pandemic. Summer drought, persistent high temperatures, severe sunburn, is conducive to the epidemic of late disease. Large planting density, partial application of nitrogen fertilizer, poor drainage, poor ventilation and light transmission can accelerate the epidemic of diseases. Drugs do not promptly ignore the control of seedbeds and fields. They did not do early investigations and early warnings, and took preventive measures at the end. Third, control methods Select and promote disease-resistant varieties. Seed disinfection. Use 4% agricultural anti-120 melon vegetable tobacco type 100 times liquid soaking for 12 hours, remove and cool and dry directly after sowing. It can also be pre-soaked in cold water for 1-2 hours, then soaked in warm water at 55°C for 10 minutes, cooled in cold water, and then germinated. Reasonable rotation. With wheat and corn, 2-3 years of rotation will be implemented to avoid continuous cropping with melons and vegetables. Strengthen cultivation management. According to species characteristics, water and fertilizer conditions, close planting is reasonable; the greenhouses should be ventilated and ventilated in a timely manner to avoid high temperature and high humidity; timely drainage after rain; timely removal of diseased leaves, diseased fruits, and stubbles; increased application of phosphorus and potassium fertilizers to increase plant resistance to disease ability. Chemical control. In the initial stage of disease, spraying 4% of agricultural anti-120 melon vegetable tobacco type 600 times every 10-15 days, even spraying 3-4 times, the control effect can reach 95.6%. It can also spray 80% Daisen Meng Zinc 600 times, 75% chlorothalonil 600 times. The seedbed is used strictly, and the field must be sprayed continuously to achieve a good control effect. This classic solid color version of a
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Causes and Integrated Control of Hot Pepper Anthracnose