After the rain is the season of sowing cabbage seedlings such as Chinese cabbage, cabbage, and late autumn green pepper. High-temperature and high-humidity conditions will aggravate the occurrence of damping-off disease in a variety of vegetable seedlings. Once ineffective control can destroy the seedlings and delay the optimal planting time of vegetables. The control method should be sprayed with 69% zinc methoxide zinc 800 times at the emergence of vegetables. At the same time, seedlings should be controlled to water after emergence to prevent artificially increased humidity and aggravate the occurrence of diseases.
Autumn green bell pepper disease
Autumn pepper blight occurs more seriously during the seedling stage. If there is a shortage of plants, the ridges will be cut off and the sheds will be destroyed. The disease has a short course of disease, rapid onset, and more dead seedlings under conditions of high temperature and high humidity. The germs invade from the young stalks of young green peppers. The prevention and cure methods are the best for planting roots. After the autumn pepper is planted, 69% of manganese zinc zincate is used to water the root in 800 times, and 300-350 kg of liquid is poured per acre. For the large planting area, water inconvenience can be used to spray the roots of 800 times 3 times the fenyl cyanuric urea cyanide. Of course, prevention and control of green pepper diseases should pay more attention to the coordination of agricultural measures, mainly to improve the field water system, keep the field water, and do not flood irrigation, thereby exacerbating the conditions of the disease.
Chinese cabbage downy mildew, soft rot
Cabbage downy mildew and soft rot are the two kinds of pathogens in cabbage production, and they are the most serious diseases. Downy mildew is a kind of low-grade fungus. In the field, the symptoms start from the lower leaves in the middle and late stages of growth. The small yellow spots on the front of the leaves have a layer of mildew on the back of the macula, which spreads quickly from the bottom up in the rainy conditions. Soft rot is a bacterial disease that occurs severely in late-to-late high-temperature, rainy conditions of Chinese cabbage. Typical symptoms in the field are rotting and smelly. After many years of production practice, although the two pathogens are different, prevention and control can use a single agent to cure both at the same time and use 50% Chlorobromoisocyanuric acid 500 times spray. During the initial stage of disease prevention and control, it is best to use a mechanical misting machine to hit the back and roots of Chinese cabbage leaves. The focus of prevention and control is based on the selection of quasi-pharmaceuticals to achieve early prevention and early treatment.
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