When an insecticide is used, the effect is often very good, but as the dosage increases and the range of use continues to expand, the more effective the drug is, the less effective it is. This is because insects produce resistance. A pest is resistant to a pesticide and is often resistant to other pesticides of the same type; such interactions are unlikely to occur between drugs of different insecticidal mechanisms. When the same pesticide is used for a large number of times or the treatment concentration is high, resistance is formed quickly, and vice versa.

Therefore, first of all, the number of times and amount of drug control should be minimized.

Secondly, it is to choose insecticides with different mechanisms of action to be mixed, wheeled, and mosaicized.

The third is to improve the application of pesticides, such as symptomatic medication, timely spraying, selection of high-efficiency tools, and injection of drugs in order to maximize the killing effect.

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