Long-Term Effects of Herbicide on Spotted Knapweed in Grand Sable Dunes

Grand Sable Dunes;Transline;Milestone;Spotted Knapweed;Natural Resources and Environment

Grzesiak, KatherineLeutscher, Bruce ;

University of Michigan

关键词: Grand Sable Dunes;    Transline;    Milestone;    Spotted Knapweed;    Natural Resources and Environment;   

Others  :  https://deepblue.lib.umich.edu/bitstream/handle/2027.42/101909/Grzesiak%20Thesis%202013.pdf?sequence=1&isAllowed=y

瑞士|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

Over 80 hectares of the Grand Sable Dunes in Pictured Rocks National Lakeshore hasbeen heavily invaded by spotted knapweed (Centaurea stoebe). This species;; propensity todominate plant communities and stabilize active dunes creates the need for management inorder to protect the globally rare perched dune ecosystem and its unique inhabitants.Milestone® and Transline® herbicides were spot sprayed on research treatments ofknapweed for 5 consecutive years. Herbicide treatments were discontinued in some areas,and the recovering areas were compared to areas never invaded by knapweed. Herbicidetreatments continued to be effective in controlling spotted knapweed populations; neitherherbicide was significantly better at control of knapweed nor significantly more harmful tonative species. Treatments recovering from herbicide generally were not significantlydifferent from herbicide treatments, though some showed early anecdotal signs of recoveryor reinvasion by spotted knapweed. Continued monitoring of this site is highly suggested forincreased understanding of long-term effects of herbicide treatments.