Absinth wormwood (Artemisia absinthium L.) is a perennial broadleaf plant introduced as an ornamental into North America from Europe in 1841. The plant escaped cultivation and is now widely distributed in the U.S. and Canada. This article describes the biology, ecology, identification, and management of absinth wormwood in natural areas.Read More
Herbicides are an important tool for removing noxious or invasive weeds from plant communities, allowing desirable vegetation to respond. Field research trials were established to determine if warm and cool season grasses could be planted either in late autumn as a dormant fall planting or in the spring after a September application of herbicide.Read More
This TechNote summarizes research on: 1) Integrating herbicides with other methods for managing yellow starthistle and 2) Controlling coast fiddleneck (Amsinckia menziesii)and yellow starthistle. Also included are practical management tips on herbicide rate and time of application to optimize yellow starthistle control.
Spotted knapweed (Centaurea stoebe) is a tap-rooted perennial forb that spreads by seed. Seedlings and mature plants over-winter in a rosette stage and resume growth in early April. Spotted knapweed blooms from mid to late July through mid September.Read More
Yellow sweetclover (Melilotus officinalis) and white sweetclover (M. alba) are herbaceous, non-native legumes that are widely distributed in the United States. Learn about the biology, ecology, and management recommendations for sweetclover.
Photo by Elizabeth Bella, USDA Forest Service, Bugwood.orgRead More
The Little Wolf Fire began in August of 1994, burning over 15,000 acres of national forest and private timber lands in northwestern Montana. Open sites created by the burn and disturbance from fire-fighting activities provided ideal habitat for tansy ragwort. The County Weed District and other partners organized a cooperative weed management area (CWMA) and developed management plans to contain tansy ragwort.Read More
In 2009 a coalition of concerned individuals and agencies took action to restore about 175 miles of riparian habitat along the Dolores River between McPhee Reservoir and its confluence with the Colorado River just north of Moab, Utah.Read More
A variety of fire, herbicide, and mechanical treatments are effective for controlling established Scotch broom. However, observations regarding effectiveness of soil-active herbicides in controlling germinating seedlings of Scotch broom are limited. Researchers conducted a series of studies in growth chambers beginning in 2010 to compare the effectiveness of three soil-active auxin herbicides: aminopyralid (Milestone® specialty herbicide), clopyralid (Transline® specialty herbicide) and aminocyclopyrachlor for controlling Scotch broom seedling germination.Read More
Scotch thistle (Onopordum acanthium) is a robust non-native plant well established throughout much of the United States and Canada. Severe infestations can form tall, dense stands that impede livestock and wildlife access to desirable forage plants, impacting wildlife habitat and limiting carrying capacity of infested rangeland and natural areas.Read More
Actions taken to reestablish the pine barrens ecosystem–timber harvest, mechanical site treatment, and prescribed burning–can increase the risk of spreading invasive plants to non-infested sites. Mitigating these risks is a key component of the Northwest Sands Pine Barren Restoration Project in western Wisconsin.
Minnesota Department of Natural Resources protects resource values - Managing invasive plants is a challenge under the best circumstances, but when coupled with high recreational use, miles of trails and diverse ecosystems, it becomes even more complex.Read More
University and U.S. Fish and Wildlife Service Partner to Find Solutions - The Kufrin Waterfowl Production Area (WPA) is the heart of some of the best remaining waterfowl habitat in Minnesota.Read More
Stucky Ridge, a series of grassy, wind-blown benches and timbered gulches located near Anaconda in southwestern Montana, provides critical winter range for elk, mule deer, and bighorn sheep, and is an important rutting and calving area for elk.Read More