Why is the use of insecticide more effective?
When a drug is used, the insecticidal effect is often good, but as the dosage increases and the range of use continues to expand, cases of increased drug resistance continue to emerge. The most prominent is cis-fenvalerate, which is often referred to in the 1980's advertisement as "the blessing of righteousness." It will soon be impossible to achieve justice because even a dozen or even hundreds of thousands of doses are increased. Or the drug concentration can not kill pests. This is actually because the pests are resistant, that is, they are able to endure the ability to kill the majority of individuals in the normal population and develop them in their populations.
In fact, individuals with different levels of susceptibility to pesticides exist in the natural pest population. The use of pesticides is actually a process in which insecticides play a selective role in insect populations. Each time insecticides are used, relatively resistant individuals are left, killing relatively sensitive individuals, and the pest resistance levels are more or less increased.
It has been ascertained that: (1) Drug resistance is related to pests and their habits. Short life span, more breeding algebras per year, pests that are exposed to more opportunities for pesticides, such as cockroaches, shells, aphids, mosquitoes, etc., are most likely to produce resistant populations; (2) a pest is resistant to a pesticide, often Other pesticides of the same type are also resistant; drugs with different insecticidal mechanisms are less likely to have this interaction; (3) the same pesticide is used more frequently or with higher concentration, and the resistance is formed quickly, and vice versa.
Knowing this, we can prevent or postpone the rise of pest resistance through rational use of medicines. To this end, it advocates adopting an integrated prevention and control policy that includes breeding, promotion of resistant varieties, improvement of cultivation techniques, and development of various technologies such as biology and physics, so as to minimize the number and amount of drug control.
The second is the selection of insecticides with different mechanisms of action to be mixed, wheeled and inlaid.
The third is to improve the application techniques, such as symptomatic medication, timely spraying, selection of high-efficiency tools, spraying in place, etc., to maximize the effectiveness of the killing.
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