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Preparation and study of composite insecticido-repellent aerosols.

Insecticido-repellent mixtures sprayed on clothes, nets etc. are useful as a means of protection against attack by bloodsucking arthropods. These sprays provide repellence of insects sensitive to the repellent and kill those that are only weakly repellent sensitive. Combined formulae for aerosols including repellent DETA and the synthetic pyrethroid neopynamin ("Neorepellent-2") or sumithrin ("Sumirepellent") were proposed. The composite sprays were studied in an olfactometer fleas (X. cheopis) and under practical conditions by treating clothes with 7-15 g of mixture per 1 m2. The composite sprays gave 100% repellence for fleas and mosquitoes, 80-50% repellence for simuliids, 65-70% repellence for ceratopogonids and tabanids, 90-95% for ticks, and they killed 100% of insects having contacted treated surface. As regards Ixodes ticks, "Sumirepellent" was more effective than "Neorepellent-2" and caused irreversible paralysis. Toxicological tests showed the composite sprays to be safe in broad-scale practical use provided that measures of precaution were kept.