Wayne, R. W.Searles, H. R.Leighton, Ramer D.2014-12-302014-12-301954-04https://hdl.handle.net/11299/1687448 pages; includes drawings. 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