Hoover, EmilyRosen, CarlWildung, DavidFoulk, DougLuby, JimHertz, LeonardNoetzel, DavidStienstra, WardWright, Jerry2019-09-182019-09-181992https://hdl.handle.net/11299/2074061 online resource (PDF, 12 pages)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.enReport