You wrote specifically about permethrin....
>Another thing about insecticidal formulations of >permethrin: they break down very rapidly, especially in >sunlight. Their useful life is typically 24 hours, or >less. There must be some ingredient in clothing >formulations that, in addition to bonding, extends the >life of the active ingredient.
Then, you wrote.........
>I did some "Googling" and here's what I came up with: Permethrin is a synthetic version of pyrethrins, a group of compounds which are derived from Chrysanthymum flowers. It is an analog which has a couple of extra ingredients to protect it from the UV components of sunlight, with the result that Permethrin does, indeed, persist in sunlight. Pyrethrins, the natural version which I have been using in my garden for some 20 years now, breaks down in a matter of hours when exposed to sunlight. Being focused on organic gardening, I was unaware that permethrin is also used agriculturally, but my original statement about added ingredients to prevent breakdown in sunlight stands, only the application is different. I thank
you for bringing it to my attention nonetheless, as I now have an additional option to consider in my pest control program, pending research as to its ramifications in an organic setting.
Your confusing permethrin with pyrethrins caused confusion in others.
When confusion is caused, a lot of things happen. The confuser needs to shoulder responsibility....