Smith, Marvin E.Hard, C. GustavHodson, A. C.French, David W.2014-12-302014-12-301959-11https://hdl.handle.net/11299/16868028 pages; includes photographs. 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