This article summarizes key points for you to consider before purchasing a backpack sprayer and provides backpack sprayer calibration guidelines and maintenance tips. It also includes reviews of backpack sprayer equipment that some of our readers are currently using in field operations.Read More
Japanese hop (Humulus japonicas) is an annual, climbing or trailing vine that is native to eastern Asia. The plant was introduced to North America in the mid-to-late 1880s as an ornamental, and has become invasive in the eastern half of the United States and southeast Canadian provinces. Read about distribution, identification and management of the plant.Read More
Distinguishing between non-native and native buckthorn is important so that management efforts can be targeted appropriately. The following description separates two invasive buckthorns from native alderleaf buckthorn.Read More
Tall buttercup is an introduced perennial forb that is widespread throughout much of North America. It is invasive on irrigated and sub-irrigated pastures, meadows, stream banks, roadsides, and ditches. Integrating various management techniques—prevention along with herbicides, mechanical, manual, biological, and cultural methods—will optimize control of tall buttercup.Read More
Twenty two different knapweed (Centaurea sp) species are well established in the United States. Four of these knapweed overlap in distribution and share similar morphological characteristics. This includes spotted (C. stoebe), brown (C. jacea), black (C. nigra) and meadow knapweed (C. xmoncktonii). The key to separating these and other knapweed species are the involucre bracts.Read More
Twenty two different knapweed species (Centaurea sp) are well established in North America. Most are introduced opportunists that have aggressively invaded natural areas, pastures, open woodlands, rights-of-way, and disturbed areas. Brown (C. jacea), black (C. nigra) and meadow knapweed (C. ×moncktonii) are long-lived perennial plants that are problematic in the United States and southern Canada.Read More
Invasive plants often establish and flourish on steep, rough terrain that is difficult to access. This makes early detection and management difficult and hazardous work. Nigel Davis, a commercial applicator in Helena, Montana, understands the challenges involved with treating invasive plants in natural areas with ground-based equipment. This makes early detection and management difficult and hazardous work. Nigel Davis, a commercial applicator in Helena, Montana, understands the challenges involved with treating invasive plants in natural areas with ground-based equipment.Read 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
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
Guy B. Kyser, Arthur W. Hazebrook and Joe DiTomaso (2013-in press) Invasive Plant Science and Management (DOI: 10.1614/IPSM-D-12-00094.1, http://pinnacle.allenpress.com/doi/abs/10.1614/IPSM-D-12-00094.1)Read More
A summary of research presented as a poster–Integrated Management of Yellow Starthistle with Burning, Aminopyralid (Milestone), and Revegetation–at the Western Society of Weed Science Annual Meeting, Reno, NV 2012 by Guy B. Kyser, Arthur W. Hazebrook, and Joe DiTomaso.Read More
Fall rain and cooler temperatures provide good conditions for extending the herbicide application season. The following species and many others can be effectively controlled in the fall. Follow the links for control recommendations for each species.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.
Herbicides play an important role in integrated management of yellow starthistle and can be used alone or in combination with other techniques such as timely mowing, grazing, burning, or use of biological control insects.
Practical guidelines for cleaning and winterizing your truck-mounted, ATV, or backpack sprayers.
Proper cleaning and winterization of herbicide application equipment is important to ensure safe storage over the winter. Spending a little extra time in the fall will save you time and money next spray season!
The USDA Plants database lists more than 20 Rubus species (and associated hybrids) that were introduced to North America. Himalayan blackberry (Rubus armeniacus) and cutleaf blackberry (Rubus laciniatus) are the two most widespread of the invasive blackberry species.Read More