Interaction of Bentazon and Imazethapyr Applied Postemergence to Nutsedge (Cyperus spp.)

摘要

Field and greenhouse experiments evaluated purple nutsedge (Cyperus rotundus L.) and yellow nutsedge (C. esculentus L.) control with mixtures of bentazon [3-(l-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide] andimazethapyr {2-[4,5-dihydro-4-methyl-4-(l-methylethyl)-5-oxo-lH-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acid} applied postemergence. Mixtures of the sodium salt of bentazon at 0.6 or 1.1 kg ae/ ha and the ammonium salt of imazethapyr at 35 or 70 g ae/ha were antagonistic onpurple nutsedge in field and greenhouse experiments. Mixtures of bentazon at 0.6 kg/ha and imazethapyr at 35 or 70 g/ha were additive on yellow nutsedge in field experiments but antagonistic in .greenhouse experiments. Mixtures of bentazon at 1.1 kg/ha and imazethapyr at 35 or 70 g/ha were antagonistic on yellow nutsedge in field and greenhouse experiments.