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2. The rhizosphere of the onion can produce antibacterial microorganisms, which can inhibit the pathogens and prevent the occurrence of various vegetable diseases. By intercropping, mixing or rotating crops with green onions and vegetables, the growth of pathogenic bacteria can be effectively prevented, and the density of existing pathogens in the soil can be reduced, thereby achieving the purpose of disinfecting the soil.
3. Reasonable rotation not only improves the resilience of the crop itself.
4, change the soil. For example, in a solar greenhouse, it is possible to control the soil-borne diseases by changing the old soil to new soil. Change the topsoil of the plough layer and replenish it with non-toxic topsoil.
5, deep ploughing. It is generally required to deeply plough 40 cm after each vegetable harvest, and kill some of the bacteria by natural conditions such as low temperature, ultraviolet light, and the like.
6, disinfection. In the summer, the vegetables are exchanged for gaps. After deep tillage, the water is filled and covered with plastic film for high-temperature disinfection. The maximum temperature of the upper layer of 10 cm can reach 70 °C, which can kill a large number of pathogens. This is a simple and effective control method. .
Ecological technology to control vegetable diseases
1. After harvesting a vegetable, many germs are attached to the vegetable residue and scattered in the field, becoming a source of pollution for the simmering vegetables. Therefore, vegetable farmers should strengthen disease prevention and control in the later stage of vegetable growth, reduce the number of pathogenic bacteria, and completely remove the residual branches and leaves after harvesting each vegetable, and remove the roots from vegetables that are susceptible to root diseases.
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