Controlling Tansy Ragwort in Natural Areas

Controlling Tansy Ragwort in Natural Areas

Tansy ragwort (Senecio jacobaea) is a winter annual, biennial, or short-lived perennial plant in the sunflower family. The plant is classified as a noxious weed in seven western states (AZ, OR, WA, CA, MT, CO and ID), two eastern states (CT and MA), and Canadian provinces.The invasive plant is well suited to disturbed sites such as roadsides, open forests, logged areas, burned sites, and over-grazed meadows and pastures.  Read tips and recommendations for managing tansy ragwort in natural areas.

Read More

Managing Scotch Thistle on Rangeland and Natural Areas

Managing Scotch Thistle  on Rangeland and Natural Areas

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

Saint Johnswort Biology, Impact and Management

Saint Johnswort Biology, Impact and Management

St. Johnswort, also known as Klamath weed or goatweed, was introduced to the United States as an ornamental and medicinal plan. This taprooted perennial now occurs in all but 2 states and is a challenge to land managers. Read more about the impacts, identification, and management using various methods. 

Read More

Nozzles: Small in Size—Big in Importance.

Nozzles: Small in Size—Big in Importance.

Spray nozzles are an important part of your herbicide application program. There are many different types of nozzles available from manufacturers, and each nozzle can perform differently. Review some guidelines for selecting the proper spray nozzles and operating them effectively.

Read More

How much is enough: Effect of Spray Volume on Controlling Invasive Knotweeds

How much is enough: Effect of Spray Volume on Controlling Invasive Knotweeds

Dr. Mark Renz and Tony Summers with the University of Wisconsin conducted a field study in 2014 in McFarland, Wisconsin to determine if the amount of spray volume would impact knotweed control with Milestone at the spot treatment rate of 14 fluid ounces per acre (fl oz/A).

Read More

Common Tansy Identification and Management

Common Tansy Identification and Management

Common tansy (Tanacetum vulgare L.), also known as garden tansy and golden buttons, is a perennial forb that reproduces by seed and rhizomes. Read more about identification and management of this invasive plant.

Read More

Proper Herbicide Application Timing Maximizes Invasive Plant Control

Proper Herbicide Application Timing Maximizes Invasive Plant Control

Spring and early summer can be excellent times to control actively growing invasive plants with herbicides. Applying herbicides to the target plant at the optimum growth stage is important to maximize control. The following guidelines provide information on the best application timing and rate to control key invasive plants.

Read More

Controlling Invasive Weeds in the Fall

Controlling Invasive Weeds in the Fall

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

Optimizing Knotweed Control and Estimating Costs to Eradicate Populations

Optimizing Knotweed Control and Estimating Costs to Eradicate Populations


Studies conducted by the University of Wisconsin measured Bohemian knotweed (Fallopia x bohemicum) control under various treatment scenarios. These included 1) herbicide selection, rate and application timing, 2) spray volume, 3) mowing prior to herbicide application, and 4) feasibility and cost of knotweed eradication.

Read More

Twenty Years of Success: Managing Tansy Ragwort in Northwestern Montana

Twenty Years of Success: Managing Tansy Ragwort in Northwestern Montana

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

Restoring the Bosque: Lessons from 32 Years of Riparian Management

Restoring the Bosque: Lessons from 32 Years of Riparian Management

The Bosque del Apache National Wildlife Refuge lies in the heart of New Mexico’s middle Rio Grande Valley. These valuable wetlands serve as a winter home for tens of thousands of migratory waterfowl. and provide critical habitat for a variety of wildlife. Today, the refuge is one of the largest riparian restoration programs in the southwestern U.S. This article reviews 32 years of wetland restoration and paradigm shifts that resulted from testing and implementing various saltcedar management tools.

Read More

The Most Popular Mobile Applications (Apps) for Invasive Plant Managers

The Most Popular Mobile Applications (Apps) for Invasive Plant Managers

In January 2018, a web-based survey on mobile applications was emailed to invasive plant managers to identify mobile-device applications currently used to support invasive plant management activities and share information on how individual apps ranked in terms of user satisfaction. Details on demographics and affiliation for this survey are available here.

Read More

West Region Summary: The Most Popular Mobile Applications for Invasive Plant Managers

West Region Summary: The Most Popular Mobile Applications for Invasive Plant Managers

In January 2018, a web-based survey on mobile applications was emailed to invasive plant managers to identify mobile-device applications currently used to support invasive plant management activities and share information on how individual apps ranked in terms of user satisfaction. Results from western states are summarized in this article.

Read More

Native and Exotic Thistles: Who's Jekyll, Who's Hyde?

Native and Exotic Thistles: Who's Jekyll, Who's Hyde?

There are five common exotic thistles (exluding Centaurea spp., both the starthistles and knapweeds) in the western U.S. that are problematic to some degree across a variety of habitats.

Read More