Patterson, C. D.Mowry, J. L.Cavert, Wm. L.2014-12-302014-12-301918-12https://hdl.handle.net/11299/16859412 pages; includes photograph. This archival publication may not reflect current scientific knowledge or recommendations. Current information available from the University of Minnesota Extension: https://www.extension.umn.edu.en-USNewsletter or Bulletin