Auxin Resistance Already Out There!<BR>Older chemistries <BR>2,4-D (1945) <BR>dicamba (1967) <BR>32 species worldwide <BR>8 species in US <BR>tall waterhemp (NE, IL) <BR>yellow starthistle (WA) <BR>speading dayflower (HI) <BR>wild carrot (MI, OH) <BR>smooth crabgrass (CA) <BR>barnyardgrass (AR, LA) <BR>kochia (MT, ND, ID, CO, NE, KS) <BR>prickly lettuce (WA)<BR>