PPO Herbicides<BR>Resistance has already been reported in other areas!!! <BR> <BR>Amaranthus quitensis <BR>2005 (Bolivia) <BR> <BR>Common waterhemp <BR>2001 (Kansas) <BR>2002 (Illinois) <BR>2005 (Missouri) <BR>2009 (Iowa) <BR> <BR>Common ragweed <BR>2005 (Delaware) <BR>2006 (Ohio) <BR> <BR>Wild poinsettia <BR>2004 (Brazil) <BR> <BR> <BR> <BR>