Control of Weeds in Peanut (Arachis hypogaea) Using Flumioxazin¹

Flumioxazin in combination with ethalfluralin provided early-season control of eclipta, pitted morningglory, and Texas panicum. Metolachlor plus flumioxazin failed to adequately control pitted morningglory (less than 80%), while flumioxazin did not control yellow nutsedge. Eclipta control with flumioxazin plus dimethenamid, imazethapyr, or metolachlor combinations were at least 99%. When flumioxazin was used in combination with dimethenamid, imazethapyr, or metolachlor, late-season yellow nutsedge control was greater than 70%. Late-season eclipta control was greater than 80% with flumioxazin alone, dimethenamid plus flumioxazin applied preemergence (PRE), ethalfluralin applied preplant incorporated (PPI) followed by (fb) flumioxazin at 0.07 kg/ha applied PRE, imazethapyr plus flumioxazin at 0.09 kg/ha applied PRE, metolachlor plus flumioxazin combinations applied PRE, or ethalfluralin applied PPI fb imazapic applied postemergence (POST). Late-season pitted morningglory control was less than 65% for all herbicide programs. Flumioxazin alone controlled no greater than 25% pitted morningglory, while ethalfluralin plus flumioxazin combinations controlled less than 48%. Late-season, flumioxazin alone controlled less than 70% Texas panicum, while ethalfluralin alone provided 84% control. All ethalfluralin plus flumioxazin combinations controlled 70 to 83% Texas panicum, while imazethapyr or metolachlor plus flumioxazin combinations controlled less than 70%. Yellow nutsedge control was greater than 70% with imazethapyr or metolachlor plus flumioxazin combinations.