First, pepper damping-off disease
Pepper damping-off disease is a seedling disease of pepper, which mainly harms pepper seedlings in seedbed. It will happen when the temperature and humidity can't reach the growth habit of pepper seedlings. Generally speaking, pepper damping-off is mostly caused by continuous cropping and extensive management.
For prevention and control, first, don't raise seedlings on the same crop; Secondly, spraying bactericide such as cardan or copper acetate in the seedbed for disinfection; Third, when damping off occurs, spray 30% metalaxyl+cardan, and spray Bacillus subtilis+cardan for the second time.
Second, pepper blight
Pepper blight is a disease caused by lower fungi, which is called black stalk, black head or pepper defoliation by farmers' friends, and has a fast onset. If it is not controlled in time, the harm is extremely serious.
Pepper blight should be invisible or the disease is already very serious, so it is very passive to prevent it. Prevent pepper blight in the early stage. Suggest spraying cardan, mancozeb, azoxystrobin, pyraclostrobin, etc. It is suggested to use cardan+dimethoxy cymoxanil or dimethomorph azoxystrobin in the early stage, and the effect is very good.
Prevention and control of serious diseases requires two treatments, and the first one should be based on rapid treatment. It is suggested that 50 grams of chlorobromoisocyanuric acid mixed with 30 kilograms of water can have a good therapeutic effect, but the duration is too short. Spraying oxazolidone cymoxanil or cyazofamid+dimethomorph once every 5-7 days can basically solve the harm of the disease.
Three, pepper anthracnose
Pepper anthracnose and pepper sunburn often occur at the same time, which are harmful to each other, especially in high temperature weather, when pepper is sunburned, anthracnose can often be caused. Therefore, it is very necessary to control pepper anthracnose, especially in the fruiting period.
Recommended control agents: benomyl or penconazole+cardan or thiophanate+calcium fertilizer+brassinolide.
Four, pepper virus disease
Pepper virus disease is not only frequent, but also difficult to cure. Therefore, it is recommended to focus on prevention. It is best to apply imidacloprid or thiamethoxam granules on acupuncture points before transplanting pepper, which can not only prevent underground pests, but also prevent aphids and planthoppers and reduce the transmission channels of the virus.
In the growth stage of pepper, such as spraying drugs to prevent other diseases of pepper or to protect flowers and fruits, some products such as amino oligosaccharide or lentinan can be added to increase the immunity and resistance of pepper.
Artemisinin, amino oligosaccharide+zinc fertilizer+brassinolide and chlorobromoisocyanuric acid also have good effects in the fields where virus diseases have occurred.
Finally, I send you a word: the most effective pesticide is the cheapest and most common pesticide, because the pesticide to be prevented is the cheapest. As long as it is prevented in advance, there will be no loss in the later stage.