Prairie Response to Canada Thistle Infestation, and Native Forb Response to Aminocyclopyrachlor
Journal: NDSU Repository (North Dakota State University)
Year: 2016

Prairie response to Canada thistle invasion was evaluated by comparison of forage yield between aminopyralid treated and non-treated infestations in North Dakota. In general, forage production was unaffected by Canada thistle in both grazed and wildland locations. The economic threshold was 37 stems m-2 for a treatment to be cost-effective. Canada thistle should still be controlled to improve overall flora quality. The susceptibility of 10 prairie forbs to aminocyclopyrachlor at 0, 35, 70, and 1