2008 Objectives<BR>Confirm the most effective mixture of DMDS and chloropicrin was a 79:21 when applied under high barrier mulch. <BR> <BR>Define the rate needed under high barrier mulch. <BR> <BR>Compare the most effective DMDS system to the standard in a large acreage on farm trial. <BR> <BR>Focus on annual grasses and pigweeds.<BR>