Reed canarygrass (Phalaris arundinacea L.) is an invasive species that forms dense, monotypic stands in wetlands, moist meadows, and riparian areas. We implemented a reed canarygrass removal study at five sites in eastern South Dakota using imazapyr, imazapic, and glyphosate individually and in combination. Eight treatments (five in fall, two in spring, and a control) were applied at each location in fall 2005—spring 2006. Herbicides were applied over clipped vegetation that had residual vegetation removed. Reed canarygrass cover was 93% in untreated plots, and ranged from 21%–66% in herbicide treated plots at the conclusion of the study. Herbicide treatments containing imazapyr provided control for two growing seasons.
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Vol. 34 • No. 4