Pepper pests and diseases affect the harvest, how to prevent and control pepper pests and diseases?

In the process of pepper planting, there are three main kinds of diseases that are prone to occur, namely pepper blight, pepper anthracnose and pepper wilt.

1. Pepper blight

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.

Prevention and control methods] The prevention and control of pepper blight mainly starts from three aspects: first, in the selection of varieties, select varieties with strong disease resistance to fundamentally reduce the occurrence of diseases; secondly, select plots with higher terrain and good drainage, strengthen field management, and reduce the occurrence of diseases; Third, for drug prevention and control, spray prevention and treatment can be carried out with chlorothalonil 800 times solution or 600 times manganese zinc solution of methyl frost.

2. Pepper anthracnose

Pepper anthracnose mainly affects the fruit of pepper, followed by the leaves. In the early stage of the disease, water-soaked greenish spots appear on the leaves, and later develop into round spots. The fruit is white-gray in the middle with small black spots and brown edges.

Pepper anthracnose is easy to develop in the environment of high temperature and high humidity, and the plant is not well ventilated, and the disease is more common in mid to late June.

Prevention and control methods] The prevention and control methods for pepper anthracnose are as follows: first, select the appropriate planting density on pepper planting to ensure that pepper has good ventilation; second, in the rainy season, timely drainage and drainage to protect the root system of peppers; Third, for drug prevention and control, benzoxystrobin or difenoconazole can be used for spray prevention and control.

3. Pepper wilt

Pepper wilt disease is a systematic disease, the initial manifestation of the disease is the base of the stem of the pepper water-soaked rot, if not timely control, the whole plant of pepper will quickly wither.

Prevention and control methods] The prevention and control of pepper wilt disease should be managed in the field at ordinary times, and reasonable fertilization can improve the disease resistance of plants. In the early stage of the disease, it is necessary to clean up the infected plants in time to prevent the spread of the disease to the surrounding area. In the early stage of the disease, it is watered with pyrimidine nucleoside antibiotics to prevent and control the further development of the disease.

Peppers can be sprayed with pesticides, and pesticides can eliminate pests on peppers.

First of all, choose a good variety of pepper to sow seeds, then observe the growth of peppers in the greenhouse every day, and then spray pesticides regularly.

<> pepper is relatively drought tolerant, not tolerant to stagnant water, and has a wide adaptability to the soil, and can grow in different textures of soil. Let's take a look at pepper pest control and harvesting requirements.

Pepper pests and diseases should be based on prevention, comprehensive prevention and control as the principle, strengthen the protection of spraying before the onset of the disease, and in the early stage of the disease, dialectical application of pesticides, and timely control of the spread of the disease.

a.Choose disease-resistant varieties.

b The seeds were soaked in 10% trisodium phosphate for 20 minutes, and then washed and germinated.

c. Harvest formula fertilization, apply sufficient base fertilizer, and control aphids in a timely manner. It can be sprayed on the foliar surface with 500 times of 20% virus A wettable powder, or 1000 times of phytolingling No. 11 emulsion, once every 10 days or so, and sprayed continuously for 3-4 times.

a.As far as possible, it should be rotated for 5-6 years with melons or grasses, and 80 kg to 100 kg of alkaline fertilizers such as grass ash or lime should be applied per mu during land preparation, so that the soil is slightly alkaline and inhibit the reproduction and development of bacterial wilt pathogens.

B When pepper enters the disease stage, it can be sprayed with 300 times of 14% copper ammonia aqueous solution, or 500 times of 77% wettable particle powder, or 4000 times of 72% agricultural streptomycin sulfate soluble powder, sprayed once every 7-10 days, and continuously controlled 3-4 times.

a.Adopt vegetable grain or bean rotation, and advocate ridge cropping or slope planting.

B Seed disinfection: the seeds are soaked in 52 warm water for 30 minutes, then soaked for 10-12 hours, and then soaked in 1% copper sulfate solution for 5 minutes, and can be sown and sprayed and watered in time after removing and washing, spraying and watering 50% methyl copper wettable powder 800 times liquid, 70% ethylphosphomanganese zinc wettable powder 500 times liquid, Pulik water liquid 600 times liquid-800 times liquid.

a.Implement crop rotation: Severely diseased fields can be rotated with melons or beans at intervals of 2-3 years.

b.In the early stage of the disease, 80% anthrax Fumei wettable powder 800 times can be used, or 70% methyl tobuzine wettable powder 600 times liquid-800 times liquid, or 50% carbendazim wettable powder 500 times liquid spray, sprayed once every 7-8 days, sprayed 2-3 times.

1. Cotton bollworm and tobacco insect. Spray with 1000 times of 50% phoxanthion EC or 5000 times of Kung Fu.

2. Eggplant twenty-eight star ladybugs. Spray Mingcong bucket with 20% fenvalerate, or 25% cypermethrin 3000 times, or 25% kung fu emulsifiable concentrate 4000 times.

3. Tea yellow mite. Spray with 2000 times of 75% gram mite emulsifiable concentrate, or 2000 times of 5% Nisolan emulsifiable concentrate.

The harvesting standard of fresh pepper is 15-20 days after the flowering is excited, and the fruit turns blue-green and shiny; When the peel hardens, it is the right time for harvesting.

Generally, it is harvested once every 3-5 days, and if it is not harvested in time, it will consume a lot of nutrients, affect the growth of the plant and the subsequent fruit set, and finally reduce the yield.