Effectiveness of Repellents Applied to Clothing for Protection Against Salt-Marsh Mosquitoes1

Abstract

In Florida 375 compounds that had shown promise in the laboratory for use to impregnate clothing were tested in the field against Aedes taeniorhynchus and A. sollicitans. Of these compounds 92 were effective for more than 21 days of aging, and 31 were effective after at least 36 hrs. of wear. The outstanding repellents included N-cyclohexyl-beta-butoxyethoxy-acetamide (effective after 451 days of aging in the laboratory and more than 123 days of aging and 72 hours of wear in the field); 2-ethyl-2-butyl-l,3-propanediol; 2-ethyl-hexyl diethylene glycol monoether; N-(mixed monoamyl) imide of 3,6-endomethyl-ene-4-cyclohexene-l,2-dicarboxylic acid; iso-bornyl ester of 4-morpholineacetic acid; and undecylenic acid. The n-propyl ester of N, N-diethylsuccinamic acid, n-butyl ester of mesityl oxide oxalic acid (Indalone), and the ethyl ester of beta-phenyl-beta-hydroxy-propionic acid were among the more effective repellents, and were also effective when applied to the skin.