title: Effect of temperature on the toxicities of ten pyrethroids to German cockroach (Dictyoptera: Blattellidae).
abstract: Of 10 pyrethroids tested by topical application of male German cockroaches, Blattella germanica (L.), d-phenothrin was the least toxic at 19, 26, or 31 degrees C. lambda-cyhalothrin was most toxic. Pyrethroids with the alpha-cyano moiety (fluvalinate, fenvalerate, cypermethrin, esfenvalerate, tralomethrin, cyfluthrin, and lambda-cyhalothrin) were more toxic than those without this functional group (d-phenothrin, resmethrin, and permethrin). At LC50, toxicity was negatively related to temperature. Temperature-toxicity responses of five of seven alpha-cyano pyrethroids were parallel, possibly indicating qualitatively identical but quantitatively different levels of detoxification enzymes.
authors.affiliation: Department of Entomology and Nematology, University of Florida, Gainesville 32611.
authors.forename: R W
authors.initials: RW
authors.lastname: Wadleigh
authors.forename: P G
authors.initials: PG
authors.lastname: Koehler
authors.forename: H K
authors.initials: HK
authors.lastname: Preisler
authors.forename: R S
authors.initials: RS
authors.lastname: Patterson
authors.forename: J L
authors.initials: JL
authors.lastname: Robertson
mesh_terms: D000818:Animals; D003058:Cockroaches; D008297:Male; D011722:Pyrethrins; D013696:Temperature
chemical_list: D011722:Pyrethrins