Glyphosate Resistant Horseweed in US (confirmed in 12 states)<BR>DE (2000) <BR>TN (2001) <BR>IN (2002) <BR>MD (2002) <BR>NJ (2002) <BR>OH (2002) <BR>AK (2003) <BR>MS (2003) <BR>NC (2003) <BR>OH (2003) <BR>PA (2003) <BR>CA (2005)<BR>Horseweed pictures from SWSS Weed ID Guide<BR>