What are the main pests and diseases of growing peppers? How can I protect myself?

Chili peppers like warm temperatures, water and fertilizer, but high temperature is easy to get sick, too much water is easy to shih seedlings, fertilizer is easy to burn roots, so there are different management requirements at different stages of the whole growth period. Symptoms of pepper blight are brown to brown spots on the base of the stem and branches of the pepper. If the relative humidity in the field is high, the affected area indicates the appearance of white mildew and round spots on the leaves.

To tell the truth, there are quite a lot of pepper pests and diseases, there are dozens of kinds, even the common diseases are virus diseases, blight, cataplexy, root rot, blight, anthracnose, downy mildew and other more than 20 kinds, common insect pests are tobacco worms, tobacco worms, aphids, spotted submarine flies and other ten pepper virus diseases This is caused by cucumber leaf virus and tobacco leaf virus infection, by some aphids attached to the pepper leaf surface to carry the transmission, serious conditions will lead to leaf necrosis, leaf drop, fruit drop, this virus transmission rate is high, the harm is relatively large.

The main pests and diseases of <> pepper are: cataplexy, blight, virus disease, Verticillium wilt, blight, anthracnose, soft rot, sclerotinia sclerotinia disease, gray mold, cotton blight, scab and bacterial wilt and other 12 kinds of impregnated diseases, 3 kinds of physiological diseases such as roots, umbilical rot and solar burn, drug control: we can use 25% methyl frost liquid wettable powder and fine soil to mix well, sow in the nutrient soil or spray 72% Prixene water solution 400 times after seedlings emerge, or 15% chlormycolin water solution 700 times, spray 2-3 times, once every 7-10 days.

For powdery mildew, powdery mildew is difficult to detect, so prevention is the main focus. Benzofluoramide or prochlorazine EC is usually used for spraying, and it is sprayed once every 10 days or so. When spraying, spray all plants thoroughly, especially the underside of pepper leaves.

After pepper infection with viral disease, yellow-green mosaic spots and dwarf plants were seen on the leaves. Subsequent onset of the disease can affect flowering and fruiting, and even if it bears fruit, the fruit will be uneven and difficult to enlarge. Brown necrotic streaks and dead spots can be seen on the surface of the newly born stems, leaves, and fruits.

The main pests and diseases of pepper are soft rot, blight, bacterial wilt, virus disease, do a good job of protection, to prevent crop rotation, you can use neophytomycin for sterilization, the field can not be too wet, rainy days to drain in time.

There are many common diseases of peppers, such as: powdery mildew, virus disease, leaf spot, wilt, spot blight, anthracnose, blight, sclerotinia sclerotinia and so on will occur during the growth of peppers. Choosing seeds of varieties with strong disease prevention ability can greatly reduce the occurrence of diseases.

The demand for water and fertilizer for the growth of pepper is still relatively large, but not too much water and fertilizer can not be given at one time, but according to the growth of pepper reasonable fertilization, in addition to the commonly used nitrogen, phosphorus and potassium fertilizer, but also to increase the application of organic fertilizer, microbial agents, etc., which can improve the soil structure, improve the soil fertilizer retention capacity, and enhance the stress resistance of crops. When pepper produces disease, it must be actively prevented, this time the first thing is to remove the diseased plant and destroy, and at the same time spray the agent in time, you can use a variety of agents in rotation, do not only use a single agent, easy to produce resistance. According to different diseases, different agents should be selected for spraying.

Cotton bollworm is one of the most common pests that occurs during the growth of peppers, and it affects not only the growth of peppers, but also other branches, fruits and vegetables. Cotton bollworm mainly eats the buds, flowers and fruits of peppers by small insects, harming the leaves, young stems and buds of peppers, and the flower buds are yellow-green and fall off naturally after 2 or 3 days. The larvae of the cotton bollworm gnaw on the fruit of the pepper.

Although the fruit does not fall immediately, the cotton worm gnawing on the fruit's faucet can cause rain or germs to enter the fruit, causing the fruit to rot or fall off, seriously affecting the quality and yield of peppers.

The eggs of the bollworm will stay dormant in the soil for the winter. The next year, when the temperature rises, the larvae crawl out of the soil and invade the vegetables, so avoid alternating with other eggplant vegetables when planting peppers. Moreover, before planting, turning the soil deep and drying it in the sun for 2 to 3 days can remove a part of the cotton bollworm eggs.

During the growth of peppers, according to Insect Sentiment High School, the eggs can be taken out of the vegetable garden and burned by pruning the branches that lay a lot of eggs on the cotton insects. In the peak season of cotton bollworm egging, you can spray karyotype polyhedrovirus and BT emulsion to eliminate the adult cotton bollworm. The puffing period of pepper fruit is the most serious period of cotton bollworm, so after the pepper enters the fruit puffing period, it can be effectively killed with 5000 times of kung fu oil or 2000 times of 20% more gastric humidification powder to effectively kill cotton bollworm every 7 10 days for 3 4 consecutive times.

Chemicals can not only effectively prevent cotton bollworm, but also take advantage of the widespread nature of cotton bollworm and use black light to attract insects.

The environmental conditions that have the greatest impact on pathogens are temperature and humidity. Most fungal spores require more water to germinate, and fungal swimming spores and bacteria can swim and invade in the water. The optimal humidity for the germination of most airborne fungi and spores is the highest humidity in the field, so in humid and rainy climates, serious diseases can occur, and plants are often filled with water after rain or after dense fog, which is conducive to the penetration of fungi and bacteria.

Temperature and humidity also have a direct impact on the plant's ability to hurt and heal at what speed it is.

For the open field, the temperature and humidity are not well controlled. Prevention**Prevention is mainly based on the characteristics of the hospital itself. Pests and diseases are a major obstacle to limiting the abundance of chili peppers.

The main pests and diseases of pepper are 12 infectious diseases, such as quenching disease, oral numbness, virus disease, Verticillium wilt, plague, anthracnose, soft rot, sclerotinia sclerotinia disease, gray disease, cotton disease, sores and ulcers, and green hemp disease. three physiological diseases, such as root, umbilical rot, and daily chemical corporal; There are three kinds of insects, such as aphids, swallow insects, and cotton bollworms.

1. Standing blight, pepper seedlings and adults may develop the disease, oval brown patches appear in the early stage of the disease, and the stems of the plant will gradually appear annular black brown spots, and then gradually shrink and die. Prevention and control methods: Potassium dihydrogen phosphate used in the seedling stage is sprayed for prevention, and 500 times of 36% thiophanate-methyl suspension can be sprayed at the early stage of the disease.

2. Cataplexy, cataplexy often occurs in the seedling stage of pepper, after the onset of pepper seedlings, yellow water stains will appear at the rhizome, and the later stage will turn brown, dry and wither, and a large number of seedlings will fall in severe cases. Prevention and control methods: After the disease is found, it is necessary to spray copper ammonia mixture to inhibit the spread of the disease, and 75% chlorothalonil or Pulik water agent should be sprayed for prevention and control.

Pepper cataplexy.

At this time, the introduction of seedbed low temperature and humidity caused by the disease, the general pepper seedlings are easy to suffer from the infection of pathogens after the seedlings are unearthed, so the base of the seedlings will grow a lot of black spots, slowly these black spots will slowly deteriorate along the stem, and finally erode off the whole stem so that the stem loses its ability to support and falls to the ground.