First, the Qingyuan. After the harvest of the vegetables, many germs are attached to the vegetable residues and scattered in the field. It enters the soil and becomes the source of the dipping vegetables. Therefore, the vegetable farmers should strengthen the disease prevention and control in the later stage of vegetable growth, directly reduce the base of the drug source, and completely remove the residual leaves in the field after harvesting each vegetable, and remove the roots from the vegetables susceptible to root diseases.
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Second, deep cultivation. The purpose of deep cultivation is to destroy the living environment of the bacteria. It is generally required to deeply plow 40 cm after harvesting, and kill a part of soil-borne bacteria by natural conditions such as low temperature, ultraviolet rays, and the like. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
Third, 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 soil layer at 10 cm can reach 70 °C, which can kill a large number of germs. This is a simple and effective control. Method. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
Fourth, a variety of onions. The root ring of the green onion can produce antibacterial microorganisms, which can inhibit the pathogens and prevent a variety of vegetable diseases. By intercropping, mixing or mixing crops with green onions and vegetables, the growth of pathogenic bacteria can be effectively prevented, and the density of pathogenic bacteria in the soil is reduced, thereby achieving the purpose of disinfecting the soil. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
Fifth, the rotation. Reasonable rotation not only improves the resilience of the crop itself, but also greatly reduces or loses the infectivity of the pathogens hidden in the ground after a certain period of time. There are two types of vegetable rotation: one is the rotation between vegetables and vegetables. It is required to determine the interval between the same vegetables according to the survival time of the pathogens in the soil. The second is the rotation between vegetables and food crops, such as vegetables and vegetables. The effect of water and dry rotation between rice is better. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
Sixth, change the soil. For some vegetable facilities that are relatively fixed, have small choices, and have large investment and high efficiency, such as solar greenhouses, old soil can be used to control soil-borne diseases according to new soil. Replace the root layer topsoil and replenish it with non-toxic topsoil. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
Seven, grafting. For some soil-borne diseases that are seriously harmful, high-resistance or immune rootstock grafting can control the harm of soil-borne diseases. For example, watermelon grafted on the gourd, cucumber grafted on the black seed pumpkin, can completely solve the hazards of wilt and other diseases. Linyi Fertilizer Network Copyright
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