Answer
Apr 24, 2025 - 08:12 AM
Rotating pesticides means switching between different types of pesticides to prevent insects from becoming resistant to them. Insects can develop resistance, especially to synthetic pyrethroid pesticides, when the same kind is used over and over. This usually starts when young insects—like nymphs or larvae—survive the pesticide and grow up resistant to it. These adults then pass that resistance to their offspring. Over time, more and more of the insect population becomes resistant, usually not just to one pesticide but to an entire group or "class" of similar pesticides.
Resistance is mainly a concern for insects that breed continuously, like German cockroaches, bedbugs, and fleas. These pests have all life stages present at once and reproduce steadily, which gives resistance a chance to build up.
Flying insects are different. They usually don’t breed continuously in one place. Many fly in from elsewhere throughout the day. Because of this, changing the pesticide used in automatic misting systems won’t make much difference against adult flying insects.
If you're dealing with mosquitoes that breed in still water like ponds or puddles, it's better to target their larvae. You can use mosquito dunks with Bacillus thuringiensis (BT), a natural bacteria that kills the larvae before they grow into adults.
Add New Comment