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1 results

  • Postemergence Control of Cowpea (Vigna unguiculata) in Cotton (Gossypium hirsutum)

  • Gregory S. Stapleton, Edward C. Murdock, Joe E. Toler
  • Journal:
    Weed Technology / Volume 7 / Issue 2 / June 1993
    Published online by Cambridge University Press:
    12 June 2017, pp. 478-482

  • POST control of cowpea in cotton was evaluated in 1990 and 1991. Early POST-directed (EPD) application of fluometuron + MSMA provided 89% cowpea control 2 wk after treatment. Cowpea control 4 wk after the early treatments was similar with fluometuron + MSMA EPD and sequential directed applications of MSMA followed by (fb) MSMA, methazole + MSMA fb cyanazine + MSMA, and fluometuron + MSMA fb cyanazine + MSMA. The average reduction in cowpea biomass 12 wk after planting with these treatments was 93%. MSMA fb MSMA POST-directed was the only treatment with a lint cotton yield similar to that of weed-free cotton. Lint cotton yields with fluometuron + MSMA, methazole + MSMA fb cyanazine + MSMA, and fluometuron + MSMA fb cyanazine + MSMA were similar to those obtained with MSMA fb MSMA.