Zinc phosphide, a potential replacement rodenticide for strychnine or 1080, was field tested on 3 populations of Richardson's ground squirrel. Populations were estimated pretreatment and posttreatment by mark-recapture sampling techniques. We broadcasted a 2% zinc phosphide grain bait at 5.1 kg per swath ha. Swath widths measured 6.1 m, 16.0 m of untreated areas remaining between swaths. Treated populations decreased an average of 85.1 +/- SE 6.4%. Differences in pretreatment and posttreatment population decline between treated and control populations were significant (P = 0.096). No mortality was detected among nontarget animals. The 85.1% efficacy achieved by broadcast baiting exceeded the minimum standard of 70.0% established by the Environmental Protection Agency for the registration of a rodenticide. Registration, however, will require nontarget hazard testing and further efficacy testing in other geographical locations. This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries. The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from OJS platform August 2020
Scholarly peer-reviewed articles published by the Society for Range Management. Access articles on a rolling-window basis from vol. 1, 1948 up to 5 years from the current year. Formerly Journal of Range Management (JRM). More recent content is available by subscription from SRM.