CANOEDOGS, I wanted clothing that actually was dense enough to keep the bites away instead of clothing that was impregnated with chemicals. Over time you would have to keep retreating the cloths where these cloths are chemical free. But I hear you and agree with your analogy to suit up in heavy bug country, we have some pretty good cases of encephalitis down here which are usually fatal.
I saw an interesting statement on another forum where a guy was trying to sum up deet
http://www.viewsfromthetop.com/forums/showthread.php?t=22305"DEET is nasty stuff, and permethrin comes with a MSDS attached, so it can't be all that good for you either."
"o a certain extent, this is a comparison of apples and oranges. The two treaments work by different mechanisms, only one of which is appropriate for ticks. (Of course, comparison of the final result is valid, even if the different methods use different mechanisms.)
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DEET is a repellent. (Actually is is not really a repellent, just a blinding agent--its vapor interferes with mosquitoes ability to smell and find humans. It does not necessarily chase them away.) There is no fundamental reason why it should work for other species. (It may or may not work on another species if it happens to use a similar mechanism for finding humans.)
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Permethrin is a contact insecticide. (A nerve poison, IIRC. It kills or disables insects upon contact.)
Ticks sit on plants and latch on to you when you brush by--they don't fly around and find you by smell. If you are wearing permethrin on your clothing and they touch it, they will be disabled or killed. Unless ticks happen to be annoyed or damaged by DEET there is no reason to expect it to repel them. In fact, the DEET treated subjects may have been completely unprotected from ticks. (Your experiment did not include an untreated control group so it did not address this issue.)
The best defense is a layered approach. Permethrin on your clothing and DEET on your skin. (I personally use permethrin on my clothing and only use DEET or picaridin on my skin if the mosquitoes are bad.)
BTW, Buzz-Off (tm) clothing is just permethrin treated clothing. You can apply permethrin on whatever clothing you already happen to have. Both soak-in and spray-on versions are available at hiking stores."