Dead cockroaches
Dead cockroaches
Bug Bytes

The Gray Zone of Insecticide Repellency: Revisiting Long-Held Assumptions About Pyrethroid Effects on Pests

By Alvaro Romero, Ph.D.
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Recent studies under controlled laboratory conditions have demonstrated that German cockroaches still make contact with pyrethroid-treated surfaces—contradicting the common belief that these compounds are strongly repellent. Pest management professionals should consider how formulation type, application strategy, and environmental context influence pest behavior.

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