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Another weed species shows chemical resistance (Feb. 7, 2002 – CropChoice news) – Smooth pigweed, which is common in midwestern states, has begun to show resistance to aceto-lactase synthase-inhibitor (ALS-inhibitor) herbicides. In Ohio, eight other weed species, including marestail, have begun to show signs of resistance to chemicals. Note, Pursuit, Raptor, Lightning and Scepter are ALS inhibitor herbicides. Source: AgWeb.com Related CropChoice stories: Gene stacking could lead to more weeds ; http://www.cropchoice.com/leadstry.asp?RecID=577 Does Roundup-resistant marestail illustrate problems with reliance on GM crops and pesticides? http://www.cropchoice.com/leadstry.asp?recid=248