Inquiries: I am a farmer in Yongdeng County. I have two questions. I would like to ask an expert. One is the greenhouse pepper I plant. The roots and stems have been black recently and have died of wilting. After watering, they are more serious. The cortex is dark. What should I do? The second is that in this greenhouse, there are many insects with large needles in the soil. After the roots are damaged, the peppers are affected. What is the insect? How to do?
Answer: The first problem is caused by Phytophthora capsici disease. Recently, as the temperature of the ground rises, the temperature in the greenhouse is relatively high. If you do not pay attention to the humidity, the high temperature and high humidity are very conducive to the occurrence of pepper disease. In addition to pepper, pepper diseases can damage a large number of vegetables, it is mainly wintering with the sick body in the soil, when the temperature within the shed reaches 27 ~ 30 °C, and the humidity is high, the disease is very serious.
The pepper itself is a hi-temperature crop, and 27 to 30° C. is a temperature range favorable to the growth of the pepper, but the high humidity is not conducive to the growth of the pepper, which is conducive to the infection of the disease. Phytophthora capsici is mainly invaded by the roots of vegetables and the cortex of the base of the stem. When the temperature is appropriate, as long as the humidity is above 85%, there is a water film, and can maintain 4 to 6 hours, the bacteria can complete the infection. Diseased plants are mainly spread by irrigation. Therefore, in the current management of greenhouses, special attention must be paid to humidity control and dehumidification. First, the irrigation of pepper must be shallow water irrigation at any time, the surface of the water can not spread over the ridge; Second, irrigation should adhere to the sunny morning, and pay attention to the ventilation of the greenhouse after irrigation, as far as possible to reduce the presence of dew on the stem Within 4 hours, the bacteria could not complete the infection. Third, it has now entered the high incidence stage of the chillies disease. Farmers should spray pesticides before irrigation. If there is already a diseased plant, the strains should be removed and after the medicine is applied. Irrigation; Fourth, spray control. 50% Amethyst Copper WP 1000 times, 77% Copper Hydroxide (Can be killed) 500 to 1000 times WP, 72% Glucosamine (Molybdenum Manganese Zinc) WP 800 times, 58% Metalaxyl Manganese zinc 500 times, 70% manganese manganese 1000 times wettable powder, one of the above agents, even spray irrigation, once every 7 to 10 days, once every 3 to 4 times. The fifth is to completely remove the diseased body and bring it to the field for centralized destruction to reduce the overwintering fungus.
The second problem is root cause, and the root cause is a small locust. Mainly in the rhizosphere of vegetables in the soil, root damage caused by root hair and lateral roots browning, severe rot, and cause pathogen infection, resulting in poor growth of aboveground plants. Sites with root defects are more likely to cause the infection of pepper blight.
The prevention and control method is mainly to adopt the medicine to irrigate the roots. The 50% phoxim emulsion can be used to irrigate the roots 1500 times, and 250 ml per plant.
Rechargeable Hearing Aid
Rechargeable Hearing Aid
Shenzhen Sunshine Technology Co.,Ltd , https://www.shenzhenyatwin.com