There is a big difference between being banned for poultry use, and not approved for poultry. Don't use anything banned. As to not being approved, testing for approval is expensive. While there is significantly more money involved in testing, and approval for cattle, then pork, then sheep/goats. There simply isn't enough money to be made on additional testing, and approval for use in poultry. Unless it's actually banned, quite a few livestock products work very well on poultry too, but the manufacturer simply did not go to the additional expense to get it approved for poultry.
Pyrethrin breaks down much faster, and is one of the few insecticides here, that's approved for use, and can still maintain "organic" status for those that are certified organic. Inside, or under lab conditions, residue might be of a higher concern, however, outside under typical weather conditions, it breaks down so rapidly there is not enough residue to have any effect on emerging larva emerging from the nits. This, of course, is when it's mixed, and used in accordance to the strength for mites.
As to constantly needing reapplication. That's a broad sweep of the brush. Even when you get rid of mites, that does not mean they can't be reintroduced, and return at a later time. Sooner, or later wild birds, squirrels, and other things can, and will likely reintroduce them. Treating once, without reapplying when the nits hatch, is not consistent with how it's to be done. Quite a few will treat, and it appears to have done the job, but fail to do the follow up. A few weeks later, the ones that emerged from the nits, have grown, multiplied, and once again become a problem. Not treating the entire coop, is another issue. Depending on your nesting boxes, simply putting new nesting material without washing, and/or treating the actual nesting boxes too, is leaving them a means to return. Feeders, waterers, etc., should be at least thoroughly washed as well. Failing to thoroughly tackle the problem, is an invitation for them to return. It's not necessarily a failure on the part of the product.
Typically, properly treating the entire coop, the way it should be, then repeating, will solve the problem for a decent length of time.
Pyrethrin breaks down much faster, and is one of the few insecticides here, that's approved for use, and can still maintain "organic" status for those that are certified organic. Inside, or under lab conditions, residue might be of a higher concern, however, outside under typical weather conditions, it breaks down so rapidly there is not enough residue to have any effect on emerging larva emerging from the nits. This, of course, is when it's mixed, and used in accordance to the strength for mites.
As to constantly needing reapplication. That's a broad sweep of the brush. Even when you get rid of mites, that does not mean they can't be reintroduced, and return at a later time. Sooner, or later wild birds, squirrels, and other things can, and will likely reintroduce them. Treating once, without reapplying when the nits hatch, is not consistent with how it's to be done. Quite a few will treat, and it appears to have done the job, but fail to do the follow up. A few weeks later, the ones that emerged from the nits, have grown, multiplied, and once again become a problem. Not treating the entire coop, is another issue. Depending on your nesting boxes, simply putting new nesting material without washing, and/or treating the actual nesting boxes too, is leaving them a means to return. Feeders, waterers, etc., should be at least thoroughly washed as well. Failing to thoroughly tackle the problem, is an invitation for them to return. It's not necessarily a failure on the part of the product.
Typically, properly treating the entire coop, the way it should be, then repeating, will solve the problem for a decent length of time.
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