How to treat soil-borne diseases

Soil-borne diseases refer to diseases caused by pathogens such as fungi, bacteria, nematodes and viruses living in soil with diseased organisms and attacking crops from roots or stems under suitable conditions. So, how to treat soil-borne diseases?

1. How to cure soil-borne diseases

1. Eliminate bacteria

By utilizing the good sealing performance of greenhouse, when crops change in summer season, technical measures such as flooding, burning and high temperature stewing room are adopted to eradicate residual germs in indoor soil, purify soil, strive for indoor sterility, and eliminate the first infection of various diseases mentioned above. The soil treatment of continuous cropping greenhouse with 80% ethyl allicin 4000g/ha, i.e. 260g/mu, eliminates residual overwintering colonies in soil, or uses soil bacteria to eliminate 50% uric acid, 500- 1000g/mu can effectively kill bacteria, fungi and viruses in soil.

2. Strengthen management

Pay attention to fertilizer hygiene, prevent fertilizer with bacteria from entering greenhouse; organic fertilizer applied must be covered with plastic film at high temperature in summer season and fully decomposed.

Management personnel shall change shoes, socks and work clothes in outdoor operation room to prevent clothes and shoes from entering the room with bacteria; the ground of outdoor operation room shall be sprinkled with lime surface for disinfection, shoes, socks and work clothes shall be washed frequently for drying, sterilization and disinfection; after personnel enter greenhouse, they shall close the door and lock it at will, and outsiders, especially managers of other greenhouses, are strictly prohibited from entering the room to prevent cross infection of other greenhouse diseases and invasion of outdoor germs into greenhouse.

3. Implement rotation

Deteriorating the ecological conditions of pathogens, reducing infection; increasing the application of organic fertilizer, phosphorus and potassium fertilizer and trace element fertilizer, adjusting the relationship between plant nutritional growth and reproductive growth, maintaining the robust growth of plants, and improving the disease resistance of crops.

Once the disease is found, it is necessary to take decisive measures immediately according to the type of disease, prescribe the right medicine, and resolutely eradicate it. It must not be allowed to breed or spread.

II. Misunderstanding of soil-borne disease prevention and control

1. The diagnosis of diseases is unclear and drugs are used indiscriminately. For example, some farmers mistook Chinese cabbage root swelling disease as caused by nematodes, and used nematodes to control it. For example, the diagnosis of bacterial wilt and fusarium wilt is not accurate, bacterial diseases are misused for fungal control, resulting in no right medicine and poor control effect.

2, do not pay attention to the prevention work in the early stage, when the disease occurs, only start to use drugs. The occurrence of soil-borne diseases can not be well controlled, and even cause crop yield reduction and harvest failure.