0 http://ipcm.wisc.edu/WCMNews/tabid/53/EntryId/745/Giant-Ragweed-with-Suspected-Glyphosate-Resistance.aspx Biotypes of nine weed species have been documented as glyphosate resistance in the U.S.  However, glyphosate-resistant weeds have not been OFFICIALLY confirmed in Wisconsin.  ...]]> en-US