Because soil-borne pathogens are present in the soil, two methods for the control of root-infestation and soil-mixing are generally selected. Irrigation treatment Irrigation is the application of a pesticide solution to the surface of the soil or to a shallow layer, and it exerts its efficacy by reaching a certain depth of soil through leakage. There is a limit to the depth and amount of the agent that reaches the soil during the irrigation process. In addition, irrigating roots are generally on the side of the base and cannot fully protect the roots. Due to the presence of a concentration gradient of irrigating roots, the depth of the pharmaceutical agent is required to be effective, the content of the chemical agent is small, and the surface layer that plays a minor role in disease control has a higher content of the chemical agent, and there is also a deposition of the agent on the surface layer, so that the efficacy cannot be Play effectively. Mixed drug treatment Mixing medicine is to mix the pesticide and soil in a certain proportion and then sowing or planting. It has the following characteristics: First, pesticides are dispersed evenly in the soil, which can achieve the effect of local soil disinfection, kill pathogenic bacteria in the soil around the roots of plants, and protect the root system. In addition, the chemicals are dispersed in the soil with tiny particles, and they are slowly dissolved and released to the surrounding, and the plants are continuously protected for a long period of time, which is not available in soil disinfection. Secondly, the blending medicine can also achieve the effect of seed treatment. After the seeds germinate, the medicaments are absorbed and the seedlings are protected. However, the amount of the seed treatment agent is limited, and the amount of the agent is too large to damage the seedlings, and the medicine mixed with the agent is distributed in the small space around the seed in a large space, and the dosage thereof is not limited, and it is not easy to cause damage to the seedlings. Third, the tiny particles of soil-mixing agents are evenly distributed in the soil surrounding the roots of the plants, which can provide comprehensive protection for all parts of the seedling roots after seed germination, which is also unsuitable for seed treatment. Contrast conclusion To achieve the same control effect, both soil treatments must have the same concentration of agent at a certain vertical depth (where pathogens are concentrated). Mixing soil with irrigation roots has the following advantages: 1 Mix soil application, because there is no concentration gradient, the amount of medication will be far less than the irrigation root application, if the soil is sticky, the pathogen is concentrated in the soil layer, the irrigation root application may not reach the soil layer, mix The effect of soil application control was significantly better than that of irrigation. 2 Mixing soil can give more comprehensive protection to crop roots, effectively reducing the occurrence of diseases; 3 Mixing soil application can effectively reduce the damage to the seedling caused by excessive local pesticide concentration; 4 The agent for soil mixing is evenly dispersed in the soil, and effectively reduces the deposition of the agent for irrigating the soil on the surface of the soil, and has a higher utilization rate than the pesticide for applying the root irrigation. Therefore, to control soil-borne diseases, mixing soil is more scientific than irrigating roots. Palm Recognition Access Control Chongqing Huifan Technology Co., Ltd , https://www.huifantech.com