Jester, L.L., M.A. Bozek, S.P. Sheldon, and D.R. Helsel, 1997. New Records for Euhrychiopsis lecontei (Coleoptera: Curculionidae) and their Densities in Wisconsin Lakes, Wisconsin Department of Natural Resources.

Reprinted with Permission from Great Lakes Entomologist (1997) 30(4): 169-176

New Records for Euhrychiopsis lecontei (Coleoptera: Curculionidae) and their Densities in Wisconsin Lakes

Abstract
The native aquatic weevil, Euhrychiopsis lecontei is currently being researched as a potential biological control for the exotic aquatic macrophyte Eurasian watermilfoil (Myriophyllum spicatum), yet little is known about its specific distribution in North America. In this study, E. lecontei was collected in 25 of 27 lakes surveyed for the weevil in Wisconsin, greatly increasing the known distribution of the species in this state. E. lecontei densities evaluated in 14 Wisconsin lakes ranged from <0.01 to 1.91 weevils per a apical stem of milfoil. These new records indicate that E. lecontei is widespread throughout Wisconsin and is associated with natural declines of M. spicatum in some lakes. Additional sampling for E. lecontei and research on its ecology and life history are needed to understand the role of this organism in aquatic ecosystems.

Contact: Daniel Helsel, Wisconsin Department of Natural Resources, 2300 North Martin Luther King Drive, P.O. Box 12436, Milwaukee, WI 53212
Key Words: Eurasian_watermilfoil, Biological_control, Aquatic_plant_management 
Product Type: Research, Control 
User Type: Resource Management