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HPLC scans of [14C]chlorsulfuron metabolism in excised seedlings of wheat (A) and susceptible (B) and cross-resistant (C) L. rigidum (SLR31; modified from Christopher et al., 1991). The arrow indicates the parent herbicide chlorsulfuron. The major metabolites (asterisks) in wheat and both L. rigidum populations have the same retention time.
