FLUPOXAM INDUCES CLASSIC CLUB ROOT MORPHOLOGY BUT IS NOT A MITOTIC DISRUPTER HERBICIDE

Flupoxam, an herbicide representative of a powerful new class of herbi cides intended for control of broad-leaved weeds in cereals, has been identified as a mitotic disrupter herbicide. Flupoxam was evaluated on watercress seedlings for evidence of antimicrotubule effects characte ristic of mitotic disrupter herbicides. At 1 mu M, flupoxam inhibited root elongation and induced club root morphology. However, examination by light microscopy and tubulin immunofluorescent microscopy revealed that flupoxam is not a mitotic disrupter herbicide. (C) 1996 Academic Press, Inc.