Wildlife Damage Management, Internet Center for


Date of this Version

March 1981


Published in Proceedings of the Fifth Eastern Pine and Meadow Vole Symposium, Gettysburg, PA, March 4–5, 1981, Ross E. Byers, editor. Copyright © 1981 Merson and Byers.


This year we entered into our second year of non-target species hazard assessment of Brodifacoum used (BFC; ICI Americas, Inc.) as an orchard rodenticide. The primary emphasis of this work has been to in¬vestigate the effects of BFC on birds of prey through secondary poisoning. The hazard level of BFC to raptors should be dependent on the levels found in post-treatment collections of meadow voles (Microtus pennsylvanicus). Post-treatment collections of meadow voles were made during both the 1979 and 1980 field trials. The residue analysis from the 1979 collections are now available (through the courtesy of ICI Americas, Inc.) and will be discussed.