USDA National Wildlife Research Center Symposia


Date of this Version

August 1995


This study is based on observations made during the efficacy testing for EPA product approval of Varpel Rope®, a temporary repellent for Norway rats (Rattus norvegicus) and the house mouse (Mus musculus). Animals were tested under both laboratory and field conditions. Laboratory testing was conducted at Arkansas State University, Jonesboro, AR, and resulted in 75-97% repellency. Field testing that resulted in repellency rates from 50 to 100%, was conducted in Newport, AR. Over 140 hr of videotape were recorded during the 1,800 individual laboratory and field trials. Testing was conducted from June 1989 through May 1992.