Resistance Development<BR>Economics, Effectiveness, and Ease are almost always the main factors <BR> <BR>1.  Single mode of action applied to large acreage <BR>2.  Few or no alternative classes of chemistry used <BR>3.  Little to no tillage <BR>4.  Little to no rotation in crops <BR>5.  Often in stressful environments when herbicide activity is minimized <BR>6.  Reduced herbicide rates, poor coverage, etc.. that minimize activity <BR>