Purple loosestrife (Lythrum salicaria L.) is a perennial, rhizomatous forb that invades riparian areas and other waterways throughout most of the U.S. and southern Canada The invasive plant threatens biodiversity of wetlands. Successful management requires integrating various management methods.Read More
This article reviews results of field trials conducted on a crown vetch infestation in the Upper Mississippi River National Wildlife and Fish Refuge in Wisconsin. Eight years following herbicide application control remained greater than 85%.Read More
Russian knapweed is a deep-rooted, herbaceous perennial that spreads by seed and vegetative root buds. This article summarizes the effect of various herbicides and application timing on Russian knapweed control.Read More
Common or “rough” cocklebur (Xanthium strumarium L.) is a native, tap rooted, annual broadleaf weed. The plant is a prolific seed producer that spreads easily because of its bur-like seed head. Management of the plant is described.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
An article by Byron Sleugh, Mary Halstvedt, Chad Cummings, Vanelle Peterson, Dow AgroSciences, Indianapolis, IN; and Robert G. Wilson, University of Nebraska Panhandle Research Center, Scottsbluff, NE from 2010 Western Society of Weed Science Proceedings.
Saltcedar (Tamarix ramosissima, T. pentandra, T. chinensis, and T. parviflora) and Russian olive (Elaeagnus angustifolia L.) are rapid growing, non-native deciduous trees that were introduced into the United States for erosion control (saltcedar), windbreaks (Russian olive) or as ornamental plantings.Read More
Japanese chaff flower (Achyranthes japonica) is a highly invasive, non-native, perennial plant in the Amaranth family. This article discusses distribution and management of this non-native plant.Read More
Guy B. Kyser, Vanelle Peterson, Steve B. Orloff, Steven D. Wright, Joseph M. DiTomaso (2011). Invasive Plant Science and Management: July-September, Vol. 4, No. 3, pp. 341-348. http://wssajournals.org/doi/abs/10.1614/IPSM-D-11-00002.1Read More
Silverleaf nightshade (Solanum elaeagnifolium) and Carolina horsenettle (Solanum carolinense), also known as horse nettle or bull nettle, are deep-rooted, herbaceous, perennial plants in the nightshade family. Article discusses distribution and management of the two invasive nightshadesRead More
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 article summarizes field studies established on meadow hawkweed at two sites near Santa, Idaho by Dr. Tim Prather, University of Idaho. Selective herbicides such as Milestone® herbicide have shown to control hawkweeds and release grasses and desirable native forbs. Strategically timed herbicide applications can improve hawkweed control and promote establishment and maintenance of grass cover.