Posted by Deutz Lover on June 02, 2019 at 17:24:26 from (66.172.80.74):
In Reply to: Can't seeums posted by Dpittman on June 02, 2019 at 14:51:49:
There is a merck product IR3535 which is supposed to be more effective than deet when used in 20% concentration. You have to check each brand of repellent to see if it has it. Of course these were tested again lab reared mosquitoes. Individual results vary.
There is a lemon-eucalyptus oil (para-menthane-3,8-diol, PMD) which is reported to be as effective as deet. It is currently registered in Canada and undergoing certification in the UK. It is a naturally occurring compound, but has to be refined to up the concentration. It has also been synthesized. All other natural repellents have been deemed not as effective.
I do remember a researcher giving a seminar on federally funded research on face or sand gnats especially to try DNA investigations. He concluded that elimination was doubtful and the best remedy he could offer was control. The method of control was to cut a hole in ones britches and attract them elsewhere. NIH or NSF was not amused and immediately terminated his grant.
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