![]() Manufacturers of permethrin spray for clothing note that because the spray is meant only for fabric and not for skin, for full protection people also need to use an insect repellent on their exposed skin. In one 2020 study of outdoor workers in Rhode Island and Massachusetts, there were a total of 60 tick bites over two years among the 40 workers who used permethrin-treated clothing, compared with 166 tick bites among the 42 workers who didn’t use treated clothing. But other research shows permethrin can be effective against ticks. ![]() The shirts we sprayed with deet didn’t cause any knockdowns, however, because no bugs ever landed on them.Īnd what about ticks? Consumer Reports’ testing hasn’t evaluated how well permethrin-treated clothing works against ticks. The permethrin-treated clothing also resulted in “knockdowns,” meaning mosquitoes were incapacitated or killed after contact with the clothing. “It’s like they landed on an electric grid.” ![]() Permethrin is “very irritating to ,” says Joe Conlon, a former Navy entomologist and former technical adviser to the American Mosquito Control Association. A shirt we sprayed with a deet-based repellent, meanwhile, kept mosquitoes from biting and kept them from even landing, something none of the permethrin-treated clothing items did. Two types we tested in 2016 kept mosquitoes from biting, but two didn’t. A number of studies have found that permethrin-treated clothing can help protect against mosquito bites, though results may differ depending on a variety of factors, such as the species of mosquito, the way the clothing is treated and laundered, and the level of pesticide-resistance among the mosquitoes.Ĭonsumer Reports has also tested several brands of clothing pretreated with permethrin to find out how well they worked at stopping mosquitoes from biting.
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