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Dose-response curves for herbicide-susceptible (gray line) and twice-selected (solid line, black circles) and triple-selected (broken line, white circles) diclofop-resistant L. rigidum populations. The resistant populations were the result of selection at 0.1- and 0.5-fold (twice selected) or at 0.1-, 0.5-, and 2-fold (triple selected) of the recommended dose of 375 g ha−1 (adapted from Neve and Powles, 2005a).
