Impact and management of crested wheatgrass (Agropyron cristatum) in the northern Great Plains

Abstract

Crested wheatgrass [Agropyron cristatum (L.) Gaertn.] invades native prairie and reduces diversity in the northern Great Plains. Here we review the effects of crested wheatgrass on grassland communities and ecosystems, as well as potential strategies for controlling crested wheatgrass. Because of its tussock growth form and C3 photosynthetic pathway, crested wheatgrass is likely to alter native grassland both above- and belowground. Experiments and long-term population projections suggest that both grazing and herbicide applied regularly can greatly decrease its abundance even though established populations may not be eliminated. Key words: Agropyron cristatum; non-native plant species; native grassland; invasion; crested wheatgrass management