During the planting process, peppers will be affected by anthrax, viral diseases, squatting, bacterial wilt, and epidemics. Xiaobian today said that the symptoms of pepper infection after the disease, the cause of the disease, and its comprehensive prevention and treatment technology, for the majority Planter reference.
First, pepper blight
Capsicum blight is more serious in the rainy season, and once it spreads rapidly, it causes dead seedlings and rotten fruit.
1. Field identification: Pepper can be harmed on stems, leaves and fruits throughout the growth period, and sometimes the base of the rhizome is also infected. The seedlings were watery and stained at the base of the stem, and soon they collapsed. Most of the susceptible plants are damaged by the stems, and the water spots of the lesions are green and gradually become brown and slightly concave. The lesion is circumscribed around the stem and its upper tissue is wilting and dead. Leaf lesions are nearly round or irregular. The root of the rhizome was brown rot, and the fruit began to appear dark brown water stain and soft rot. When the humidity is high, the white powdery mildew is common in the victim.
2, the cause of the disease: the disease is caused by fungal infection. The optimum temperature for infection of the bacteria is 22 °C. After heavy rain, the weather suddenly turns to the eye. When the air humidity is above 80%, the disease is prone to spread, and the soil is sticky and the poorly drained plot is heavier.
Second, comprehensive prevention and treatment methods
1. Agricultural control
First, select resistant varieties, do a good job in seed and seedbed disinfection, and strengthen seedling management to cultivate strong seedlings.
The second is to implement a rotation and rational fertilization. Do not replant or plant intercropping with Solanaceae vegetables. The base fertilizer is applied with organic fertilizer, and the formula is fertilized. According to the growth regularity of the pepper, the nitrogen, phosphorus and potassium fertilizers are applied, and the appropriate amount of micro-fertilizer is applied to enhance the resistance of the plant. The field is cleaned after the pepper is harvested and before planting, and the diseased plants and diseased bodies are removed to reduce the number of pathogens in the field.
The third is to improve the cultivation method. It is cultivated with sorghum mulch, generally 1.3 to 1.7 m wide (continuous ditch), planted two or three rows; or laterally planted with 2.3 to 2.7 m wide. Irrigation should be timely and appropriate, and a small amount of times, can not be flooded with large water, irrigation can not ridge, to avoid the spread of pathogens in the field.
2, physical control
First, the greenhouse cultivation of peppers is carried out before the planting of high temperature sheds to disinfect the greenhouse. Strengthen management after planting, regulate the temperature and humidity in the shed, and create environmental conditions conducive to the growth and development of peppers, which is not conducive to the development of disease infection.
The second is to increase the application of carbon dioxide gas fertilizer, enhance plant photosynthesis to promote the growth of sputum and improve resistance. When the diseased plants were found, they were removed and cleaned in time, and the cleaned diseased plants were deeply buried.
3. Chemical control
1 seedling prevention
From the seedling stage, spray with 50 ml of biological fungicide and 15 kg of water, and spray once every 5 to 7 days. Slightly light block: biocide 50 ml + foliar fertilizer 25 ml with water 15 kg spray, spray once every 3 to 5 days, once or twice. In the middle and late stages of the disease: use biological fungicide 75 ml + garlic oil 15 ml, spray with water 15 kg, spray once every 3 days for two or three times.
2 initial treatment
In the early stage of the disease, spray treatment with 50% fluoromanganese zinc 1000 times solution, or 68% fine nail cream·manganese zinc 800-1000 times solution. It can also be sprayed with a solution of 12.5% ​​fluazinam suspension 600-800 times, or 12.5% ​​Hanlening wet powder 1 000-1 200 times. Spray once every 5 to 7 days for 4 times.
3 root treatment
After discovering and clearing the central diseased plants, the planting points of the diseased plants are disinfected with lime water, and the plants around the central diseased plants are treated with 50% nail cream copper wettable powder 500 times liquid, or 30% methylation carbaryl 500 times liquid. Rooting is carried out, and it is continuously infused twice or three times every 4 to 5 days.
Daily management of the plots of pepper cultivation, timely detection of pepper blight, early treatment.
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