After long-term use of a particular pesticide, microorganisms or insects can develop resistance

After long-term use of a particular pesticide, microorganisms or insects can develop resistance. After spraying, the more resistant individuals are left behind, repeatedly "trained" and form a resistant population. Interchanging different types of pesticides is the most fundamental solution to combating pesticide resistance.

First, alternate between different types of pesticides. Using commonly used pesticides, applying them at the right time, and alternating their use rationally can generally control their potential harm. Second, rationally use new and old pesticides. Alternating new pesticides with older pesticides that still offer better overall performance can often yield unexpected results.
Third, flexible use of high- and low-toxic pesticides is essential. While certain pesticides are prohibited or restricted by the state, some moderately and highly toxic pesticides are still permitted. Properly scheduling the use of pesticides of varying toxicity not only expands the range of pesticides available, delays the development of pesticide resistance in pests and diseases, reduces pesticide costs, and improves pest control effectiveness.

Fourth, improve pesticide application methods. While implementing various preventive measures, including agricultural, biological, and physical ones, chemical control should be implemented. Target application times, growth stages, or areas of key crops. Improved application methods emphasize the use of high-concentration, localized sprays at the base of stems and vines. This reduces pesticide usage and residual contamination while improving pesticide effectiveness.