In order to reduce the use of chemical pesticides in vegetable pest control, it is recommended that vegetable farmers take ecological measures to prevent and control.
After the harvest of the vegetables in the Qingyuan Garden, many pathogens were attached to the vegetable residues and scattered in the field. It entered the soil and became the source of the dipping vegetables. Therefore, the vegetable farmers should completely remove the residual leaves in the field after harvesting each vegetable, and remove the roots from the vegetables that are susceptible to root diseases.
The purpose of deep ploughing is to destroy the living environment of the bacteria. It is generally required to deeply plow 40 cm and kill some soil-borne bacteria by natural conditions such as low temperature and ultraviolet rays.
Disinfection in the summer vegetable exchange gap, deep ploughing after filling the water, covered with plastic film for high temperature disinfection, the soil temperature of 10 cm at a maximum temperature of 70 ° C, can kill a large number of bacteria.
Rotational rotation can not only improve the resilience of the crop itself, but also reduce the loss of infectivity of the pathogens hidden in the ground after a certain period of time.
For soil replacement, some vegetable facilities with relatively fixed varieties, small variety options, and large investment and high efficiency, such as solar greenhouses, can be used to control soil-borne diseases by replacing old soil with new soil. Replace the root layer topsoil and replenish it with non-toxic topsoil.
Grafting for some soil-borne diseases with serious damage, grafting with high-resistance or immune rootstock can control the harm of soil-borne diseases. For example, watermelon grafted on the gourd and cucumber grafted on the black seed pumpkin can solve the hazards of soil-borne diseases such as blight.
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