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.

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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.

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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.

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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.

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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.

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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.

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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.

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Medusahead Seed Suppression with Spring Application of Milestone® Specialty Herbicide

Medusahead Seed Suppression with Spring Application of Milestone® Specialty Herbicide

The effectiveness of spring-applied Milestone® specialty herbicide in controlling medusahead seed production was tested in northern California. Read about the effectiveness of controlling this invasive grass with selective herbicides.

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Dolores River Restoration Partnership

Dolores River Restoration Partnership

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. 

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Are Drones in Your Future?

Are Drones in Your Future?

New technology for treating invasive plants in inaccessible areas—Engineering firms specializing in mobile robotic systems have developed multirotor drones (Unmanned Aerial Vehicle- UAV) complete with a lightweight spray system that can be used for a variety of agricultural applications. 

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Sustainable Management of Non-Native Thistles on Colorado’s Western Slope

Sustainable Management of Non-Native Thistles on Colorado’s Western Slope

A research project was initiated on a 10,670-acre ranch near Cimmarron, Colorado to develop sustainable management strategies for musk and Canada thistle. Objectives of the study were three-fold: 1) Investigate invasive thistle distribution through geospatial analysis; 2) determine effects of musk thistle management on forage quality and native plant diversity; and 3) develop a sustainable invasive plant management plan for the ranch.

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