Date of this Version
In the fall of 1977, New York fruit growers in the state's Hudson Valley region were given a temporary permit to use endrin in an effort to curb an increasing vole damage problem. The approval of endrin for this use was the first such large scale release of a chemical in this class since the banning in 1971 of most chlorinated hydrocarbons in this state. With approval for limited use came the obligation to monitor the Hudson Valley region for 1) efficacy of the material, 2) non-target effects on aquatic and terrestrial wildlife and 3) persistence in the orchard environment. The New York Cooperative Wildlife Research Unit agreed with the College at Cornell, the State Division of Agriculture and Markets and the State Department of Environmental Conservation to assist in this monitoring effort. In the following report we present a review of our role in the endrin monitoring effort. We also summarize the first year of a habitat manipulation experiment designed to investigate competitive interactions between the two vole species that inhabit these orchards.