Permethrin spray

[Folly's place]

Mary

 

[SeeBeeNV]

I’ve been dealing with mites this winter using permethrin 10%. I dipped my hens yesterday and when I went to put them in the brooder to stay warm (like I said, it’s winter, need to keep them warm) they were still covered in live mites.

How long does permethrin take to work? The first time it seemed almost instant, this time around I have live mites hours later.

 

[casportpony]

I’ve been dealing with mites this winter using permethrin 10%. I dipped my hens yesterday and when I went to put them in the brooder to stay warm (like I said, it’s winter, need to keep them warm) they were still covered in live mites.

How long does permethrin take to work? The first time it seemed almost instant, this time around I have live mites hours later.

Welcome to BYC! Did you make a fresh batch to spray them?

 

[Folly's place]

Welcome! once you dilute it into your sprayer, it lasts maybe a week. ALSO, that little bottle of concentrate will age out. Mine darkened in color after two years in a cabinet, and was much less effective. I bought new this summer, and it's working fine.
I called Gordon's help line, and the nice person waffled around a bit about product longevity. If yours is older, buy new. The 8 ounce bottle is pretty cheap anyway.
Mary

 

[SeeBeeNV]

Welcome to BYC! Did you make a fresh batch to spray them?

Thanks! I’ve been using BYC for years, but have never commented before

Yes. Fresh batch. There is a chance the permethrin froze. So maybe that made it less effective. But it wasn’t cloudy or changed from the first time I used it.... not sure.

 

[SeeBeeNV]

Welcome! once you dilute it into your sprayer, it lasts maybe a week. ALSO, that little bottle of concentrate will age out. Mine darkened in color after two years in a cabinet, and was much less effective. I bought new this summer, and it's working fine.
I called Gordon's help line, and the nice person waffled around a bit about product longevity. If yours is older, buy new. The 8 ounce bottle is pretty cheap anyway.
Mary

Thanks Mary. I use a fresh batch with each application and I purchased the bottle in September. So it’s not old at all.

I’ll check the girls tonight to see if any mites are alive.

Anyone have experience with permethrin not working? Or loosing effectiveness?

 

[aart]

Old stuff, weak mixture, or not getting it on the skin of bird can reduce effectiveness.

 

[casportpony]

Thanks Mary. I use a fresh batch with each application and I purchased the bottle in September. So it’s not old at all.

I’ll check the girls tonight to see if any mites are alive.

Anyone have experience with permethrin not working? Or loosing effectiveness?

What dilution ratio are you using?

 

[SeeBeeNV]

What dilution ratio are you using?

.64 oz to a gallon of water. A couple ml more, just to be sure.

 

[casportpony]

.64 oz to a gallon of water. A couple ml more, just to be sure.

You could try a higher dose.