How to prevent strong insecticides

When the author communicated with the vegetable farmers, one of the questions they asked most was that “the peony medicine was completely bactericidal and effective”. Especially in the prevention and control of vegetable wilt disease, some vegetable farmers are doing everything possible to seek good medicine. They just want to get rid of the disease and accomplish the same thing. This eager mood can certainly be understood, but the author believes that: instead of being sick and seeking medical treatment, it is better to take the initiative to attack, and from the cultivation and management to improve the disease resistance of vegetables.

First of all, the root disease occurred underground and it was not easy to find it in time. After the stems and leaves showed weakness, the bacteria had blocked the catheter and prevented the transport of water and nutrients. At this time, it was too late to control the drug. The so-called root-filling treatment is to a large extent only the protection of normal plants from infection by pathogens.

Secondly, the severity of root diseases is inseparable with the soil conditions. In particular, when the physical and chemical properties of the soil are poor and the number of pathogenic bacteria in the soil is large, the withering occurs seriously. Salt damage, soil compaction, etc. can all cause poor root growth and even the formation of wounds. This provides an opportunity for the invasion of pathogens. If there are many bacteria in the soil, then the withering will be normal. What needs to be explained here is that the new shed and the old shed are not the basis for measuring the number of germs in the soil. Although theoretically there are fewer new strains of sheds, there are fewer beneficial bacteria and there are many channels that artificially bring pathogens to greenhouses, such as the use of chicken manure. Although the old sheds have many germs, they can be controlled by beneficial bacteria, and sometimes they have fewer diseases. It is clearly impossible to improve soil conditions simply by using medicines.

In addition, the growth of the roots directly determines the condition of the roots. For example, the calcium, phosphorus, and zinc elements required for root growth are insufficient, root growth is slow, and it is difficult to form a robust root system. Its resistance to diseases is necessarily weak; for example, organic fertilizer is not sufficiently cooked and fertilizer is excessively large, causing burning of roots. Excessive amounts of water cause roots and other conditions are important reasons for aggravating wither.

In addition, when I visited the countryside, I discovered that some pepper and round tomato planters used hydroponics (large-water flood irrigation, like transplanting rice to transplant planting). The disadvantages were more obvious. Water planting will inevitably cause human wounds, high humidity conditions and the presence of wounds. Will the bacteria be polite? Similarly, the robustness of the root system cannot be achieved by pure medicine alone.

In summary, the emphasis on the prevention and control of pharmaceuticals, rather than on the maintenance of roots and soil, is the root cause of the proliferation of vegetable root disease and long-term treatment. Therefore, the prevention and control of root diseases must first focus on cultivation and management, improve the soil, and protect the root system.

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