Eckles, C. H.Palmer, L. S.Gullickson, T. W.2014-12-302014-12-301930-09https://hdl.handle.net/11299/1684227 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