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Bibliography Note: |
Includes bibliographical references (page 14). |
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Contents Note: |
Contents: The problem -- Development of zinc phosphide bait. |
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Summary, Etc. Note: |
Abstract: A program was undertaken to develop zinc phosphide as a replacement for the more hazardous toxicants currently available to control black-tailed prairie dogs (Cynomys ludovicianus). Four field trials at 15 black -tailed prairie dog colonies in Montana, Colorado, and Nebraska resulted in consistently high reductions in prairie dog activity when colonies were prebaited and the bait was applied in surface bait spots at the low rate of 4 g per burrow. Extensive surveys during these trials revealed no primary or secondary hazards to any nontarget species. Experiments ot measure zinc phosphide residues in range vegetation demonstrated that baiting, even at a much higher rate than 4 g per burrow, caused virtually no environmental contamination. This series of studies produced a recommended method for control of black-tailed prairie dogs: prebaiting followed by one surface application, at 4 g per burrow, a bait formulated from steam-rolled oats, 2% zinc phosphide, and 1% corn oil. All evidence from laboratory and field tests indicates that this treatment is effective and safe, and that the risk of its resulting in either primary or secondary intoxication of nontarget vertebrates, including black-footed ferrets, is remote. |
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Additional Physical Forms: |
Online version: Tietjen, Howard P. Zinc phosphide. Washington, D.C. : U.S. Dept. of the Interior, Fish and Wildlife Service, 1976 (OCoLC)607856831 |