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Alan from Shiocton Wisconsin writes

Does Bifen XTS work on deer flies?

Answer:

Bifen XTS is not labeled for flies except for certain plant-infesting flies. Instead, you should consider using Onslaught Insecticide, as it is labeled for deer flies. View the full Onslaught Insecticide product label for more information. 

Answer last updated on: 06/22/2026

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Bifen XTS

Bifen XTS

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$55.98

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