Imazapyr  Summary<BR>Plant density was not impacted by any rate <BR> <BR>1/10th and 1X rate regardless of timing caused: <BR>Significant stunting and chlorosis (1X rate) <BR>Significant reductions in plant canopy <BR>Significant Yield loss <BR> <BR>Drift Rates =1/100th X should not cause significant yield loss <BR> <BR>Half-life various: 25 -142 days in soil, 2  3 days in shallow ponds <BR> <BR>