There are many diseases and insect pests of pepper, including virus disease, root rot, Fusarium wilt, anthracnose, brown spot, scab and other diseases. The main pests are root nematode, whitefly, black cutworm, tobacco worm, aphid, grub and so on.
The prevention and control of pepper diseases and insect pests should start from the source, and do a good job in seed disinfection and prevention during the growth period, which generally will not have a big impact, specifically.
First, seed disinfection
Pepper seeds will carry germs more or less on the surface, so disinfection is the primary task to reduce the occurrence of diseases. Generally, hot water soaking or liquid medicine soaking can eliminate anthracnose, scab, bacterial wilt, virus disease and other germs.
Second, cultivate strong seedlings
Through a series of measures, we have cultivated high-quality seedlings with white roots, strong roots, many fibrous roots, short and thick stems, green stem surface, toughness, large and plump leaves, dark green color, moderate petiole length, no pests and diseases, no diseased spots and no scars.
Third, soil preparation
Choose non-continuous cropping, non-saline-alkali, non-low-lying, high-dry, well-drained soil, deeply turn over the frozen soil, and apply decomposed high-quality manure to achieve the purpose of eliminating virus diseases, Fusarium wilt, anthracnose, cutworms, grubs and so on.
Fourth, drug control
For plant diseases and insect pests, prevention is more important than cure, and prevention is the best treatment. Don't think that if there is no disease and no insect, you don't need to spray drugs. Once you get sick, the cost is high and the effect is not good. The main drugs you choose are copper preparations such as Kebingling, carbendazim, kocide, methyl bromide, benomyl, Bordeaux mixture, yellow board, cypermethrin, imidacloprid, emamectin benzoate and matrine.
Botrytis cinerea mainly harms young fruits and stems and leaves, and it is easy to get sick when cultivated in greenhouse, and it will be seriously damaged when it meets low temperature and rainy weather. Therefore, ventilation and light transmission should be strengthened to reduce the humidity in the greenhouse and remove diseased leaves and fruits in time. In the early stage of the disease, you can choose general tree protector+plant cell immune factor for disinfection and sterilization to improve the immunity of plants and promote their healthy growth. The prevention and control of virus diseases should start with agricultural prevention and control, implement crop rotation, strengthen fertilizer and water management, and prevent aphids in time to reduce human infection. To prevent and control bacterial wilt, it is suitable to apply quicklime to neutralize soil acidity, pull out diseased plants in time, and sprinkle quicklime around the planting hole, and spray it in situ with the general of tree protection to play a role in sterilization and disinfection. Anthracnose can be controlled by 75% thiophanate methyl 1000 times solution and 800 times solution of new high-fat film.
Pest control. Aphids can be controlled by 10% once cleaning 3000 times solution and new high-fat film 800 times solution. When red spider and tea yellow mite are seriously damaged, the leaves will shrink and the fruit quality will decrease. 73% propargite can be sprayed with 2000 times solution. At the same time, weeds and broken branches in the field should be removed in time to reduce the occurrence of insect sources.