Understood. You are absolutely right about that. For treating the birds it's great stuff and I can see where the residual action is a good thing rather than anything to be concerned about regarding care for our birds. I apologize for not making my motive clear on this one.I guess I'm just a bit anal (LOL) when it comes to this. I want to know just how long Permethrin stays active and how long until it breaks down. I've been unable to find that information anywhere. It's a known with Pyrethrin which I've had amazing results with. I have to say I haven't had nearly the successes I've had with Permethrin. The difference for me now is, that real Pyrethrin is nearly impossible to find at a halfway reasonable price.
Sarah,
It's that residual effect with permethrin that gives success. No matter how much you shake and bake, and spray your birds, you are going to miss a few mites on them, and in the coop in the deep cracks. The residuals will knock those out. Pyrethrin only lasts 24 hours, less in direct sun. That's why I use PERMETHRIN. No bugs here. My wrens are happy and healthy too!
I'm wanting to know just how long that residual effect stays not for chickens but for the garden though. I've actually never had a reason to use it on my birds except under the bird cage tray where moths like to try and lay eggs sometimes. Doesn't hurt the cockatiels at all I know. And it if doesn't hurt them, I seriously doubt it'll hurt any other birds. BUT. For the few times I need to use it in the garden, I want to be sure I know how long that effect lasts. I just don't want to eat the stuff. With pyrethrin, I know for fact that after 24 hours, it's chemically inert and knocks bugs out quick.
Also there is the question of it hurting soil organisms we do want, like earthworms and beneficial nematodes. With Pyrethrin, it's inert so quickly that it likely won't damage them. But with permethrin, put enough on, and it if stays stable for like say a week, and you till or water heavily then it's going down there and killing them. Probably it would take a lot to really do it, I don't know. But I would like to find out.
This has been wordy but here's why I'm so concerned: Pyrethrin is the only way I can rid my vegetable garden of an ant bed. And to do so, I have to drive rods down in that bed and pour the stuff in there quickly and as much as I can get. BANG the ants are dead and soon the chemical is inert and all the good critters can go about their way repopulating that area. I fear this is not the case if I use permethrin the same way. I have done it, and that area still seems rather "sterile" to me. Don't like it.
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