Gas price increase= Nitrogen price increase. Mother Nature continues to adapt. AgAnswers/War'sImpactOnAg/ResistantLambsquarters/BedAndBreakfastSeminar/Events - Read Message http://www.agriculture.purdue.edu/aganswers/2003/03-18_War_Conflict_Farmers.htm Sorry guys the resistance issue didn't show up here so here is part of what they had to say: Another weed standing up to herbicide put-downs Judicious use of chemicals in Ohio crop fields is becoming more important as the list of herbicide-resistant weeds continues to grow. Ohio State University Extension weed scientists have identified another ALS-resistant weed. Common lambsquarters makes the ninth confirmed weed species that has gotten the upper hand on acetolactate synthase-inhibitor herbicides, commonly referred to as ALS-inhibitors. This herbicide site-of-action group kills weeds by preventing the plants from producing essential amino acids that are needed for proper growth and development. "Growers must understand their herbicide site-of-action and how it works, and change herbicides frequently enough to delay the onset of resistance," said Jeff Stachler, an Ohio State Extension weed scientist. "You can't stop resistance from happening, but the frequency of the selection pressure depends on how often and how quickly weed populations will change."