What medicine do property companies usually use to fight flies, mosquitoes and cockroaches in office buildings?

It's usually pyrethroids, depending on what you bought, wettable powder, suspending agent and emulsifiable concentrate. Wettable powder has lower requirements than the other two processes, is relatively more economical and practical, and its effect is not as good as the other two, but it is generally invisible if it is not strict experimental data, but its smell is generally slightly larger. Depends on their choice.

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