Field Tests with Repellent Treated Wide-Mesh Netted Jackets against the Valley Black Gnat, Leptoconops Carteri.

摘要

Repellent-treated bed nets and net jackets have been shown to provide protection against many blood-feeding diptera. Since the treated net jacket appeared to have a broad repellency spectrum, we tested it against the valley black gnat, Leptoconops carteri. The jackets were composed of polyester netting with cotton strands woven in for the repellent reservoir. Jackets were treated with an acetone solution of technical grade n-n-diethyl-meta-toluamide (DEET) to obtain a dosage of 1/4 gram actual per gram of netting. The results show that adequate protection (96.6%) was provided by the freshly treated jackets. Inadequate protection (68.7%) was obtained after 14 days of aging. This indicates that protection time, using jackets repackaged after each use, would be somewhat less than 325 hours. (Author)