Effect of temperature on the toxicities of ten pyrethroids to German cockroach (Dictyoptera: Blattellidae).
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.
Wadleigh
R W
RW
Department of Entomology and Nematology, University of Florida, Gainesville 32611.
Koehler
P G
PG
Preisler
H K
HK
Patterson
R S
RS
Robertson
J L
JL
D000818:Animals; D003058:Cockroaches; D008297:Male; D011722:Pyrethrins; D013696:Temperature
D011722:Pyrethrins