U.S. Department of Agriculture: Animal and Plant Health Inspection Service


Date of this Version

January 2001


Published in Proceedings of the 23rd Sunflower Research Workshop (January 17–18, 2001, Fargo, ND). National Sunflower Association, Bismarck, North Dakota.


In 1989, the USDA began experimenting with cattail management to reduce sunflower damage caused by blackbirds. Dense stands of cattail, which often hold large numbers of blackbirds in late summer and early fall, were thinned with glyphosate-based herbicide. Based on promising results from initial research, a statewide cattail management program was started by the USDA in 1991.