Beard M L, Rose S T, Barnes A M, Montenieri J A
Division of Vector-Borne Infectious Diseases, Centers for Disease Control, Fort Collins, Colo. 80522.
J Med Entomol. 1992 Jan;29(1):25-9. doi: 10.1093/jmedent/29.1.25.
Permethrin, a pyrethroid insecticide, applied on two plots with a pressurized hand-held duster at mean rates of 2.3 and 4.0 g per burrow, was used to determine control levels for Oropsylla hirsuta fleas, a vector of bubonic plague, in black-tail prairie dog, Cynomys ludovicianus, burrows in northern Colorado during the summer of 1988. Burrows were sampled by "flagging" at day 0 and weeks 1, 3, 6, 9, and 12 to determine the mean number of fleas per burrow and percentage of burrows with at least one flea. The 4.0 g per burrow rate was highly effective (P less than 0.001) in controlling fleas for a period of 3 mo, whereas the 2.3 g per burrow rate was not.
