F9001 FOR PREEMERGENCE YELLOW NUTSEDGE CONTROL. G.K. Breeden*, J. Brosnan, M. Elmore, and B. Walls, University of Tennessee, Knoxville, TN (14)
ABSTRACT
At no time during this study was bermudagrass injury observed. Applied EPRE, F9001 SC at ≥706 g ai/ha controlled yellow nutsedge ≥ 88% at 105 DAIT through the end of the study. F9001 SC at 493 g ai/ha applied EPRE controlled yellow nutsedge 83% at 105 and 134 DAIT. All rates of F9001 SC applied LPRE controlled yellow nutsedge ≥87% on all rating dates. F9001 G applied EPRE and LPRE at 908 g ai/ha controlled yellow nutsedge ≥ 87% at all rating dates. EPRE applications of F9001 G at ≤ 706 g ai/ha controlled yellow nutsedge ≤ 85% at 105 DAIT through the end of the study. LPRE applications of F9001 G at rates ≤ 706 g ai/ha controlled yellow nutsedge ≤ 90% at 105 DAIT through the end of the study. Applied EPRE and LPRE, sulfentrazone + prodiamine controlled yellow nutsedge ≥87% at 105 DAIT. Sulfentrazone + prodiamine control of yellow nutsedge reduced to ≤83% at 134 DAIT for both timings. Both formulations of dithiopyr controlled yellow nutsedge 0% at all rating dates. These data suggest that F9001 can be used to provide preeemergence control of yellow nutsedge.