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Posted 7/10/2025 20:16 (#11293239 - in reply to #11293199)
Subject: RE: Biting flies on calves 8-10 weeks old?

NW Iowa

If they are in buildings or in single pens
You can fog them every few days with permethrin.
Pretty easy, I've done it with group of cows under a tree. You can fog right through them.
https://www.valleyvet.com/ct_detail.html?pgguid=ae8fad6f-a48b-4ff8-9...
Or you use a regular sprayer with water.
This is what i will hit them with if its bad. I'll call them in and dose them. If it rains it's gone.
https://www.valleyvet.com/ct_detail.html?pgguid=71f6b1b9-8ecf-426e-b...

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