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.

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Tips for Managing Undesirable Brush and Vines in Fall, Winter, and Early Spring

Tips for Managing Undesirable Brush and Vines in Fall, Winter, and Early Spring

Undesirable or invasive woody vegetation threatens the biology and ecology of prairie grasslands and native woodlands. Removing invading woody species can be accomplished year-long, with fall, winter and early spring herbicide applications, extending your vegetation management efforts.

 

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Long-term Control of Crown Vetch at a Wisconsin Wildlife Refuge

Long-term Control of Crown Vetch at a Wisconsin Wildlife Refuge

Field trials were conducted on a crown vetch infestation located on Boomerang Island in the Upper Mississippi River National Wildlife and Fish Refuge in Wisconsin. Eight years following herbicide application control remained greater than 85%.

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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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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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Midwest/East Region Summary: The Most Popular Mobile Applications for Invasive Plant Managers

Midwest/East 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 midwestern and eastern states are summarized in this article.

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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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Identification and Management of Invasive Knotweeds

Identification and Management of Invasive Knotweeds

There are four highly invasive knotweed species typically included in the complex including Japanese knotweed (Fallopia cuspidatum); giant knotweed (Fallopia sachalinense); Bohemian knotweed (Fallopia x bohemicum), a hybrid between giant and Japanese knotweed; and Himalayan knotweed (Persicaria wallichii). Knotweed control efforts typically require a combination of treatments over multiple years. 

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After the Smoke Clears – Resources for Addressing Post-fire Weed Invasion and Expansion

After the Smoke Clears – Resources for Addressing Post-fire Weed Invasion and Expansion

Catastrophic fire seasons of recent decades prompted a number of agencies and researchers to synthesize and expand upon the knowledge-base related to invasive plant issues following wildfires. The following short list of literature reviews, handbooks, and recently published research provides a starting point for exploring issues and developing management guidelines related to invasive plants following wildfires. 

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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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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).

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Landowner-Hunter Partnership Supports Habitat Conservation: Controlling Invasive Plants Enhances Diversity

Landowner-Hunter Partnership Supports Habitat Conservation: Controlling Invasive Plants Enhances Diversity

Chris Hitzeman, a farmer and owner of U-Guide South Dakota Pheasant Hunting, gathered the group to discuss the challenges and benefits of restoring wildlife habitat. This diverse collection of individuals shares an interest in expanding and improving habitat for wildlife in the prairie region.

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Integrative Management of Sericea Lespedeza in Prairie Restorations

Integrative Management of Sericea Lespedeza in Prairie Restorations

Researchers at Southern Illinois University conducted a study on sericea lespedeza in the Crab Orchard National Wildlife Refuge. The goal of the research was to explore a comprehensive approach to reducing the abundance of sericea lespedeza by: 1) measuring the level of sericea lespedeza control and forb tolerance to varying rates of herbicides applied in spring and summer, 2) comparing effectiveness of summer-applied to spring-applied herbicide treatments, and 3) determining how supplemental seeding of native grasses and forbs enhance restoration success following herbicide treatment. 

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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. 

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Impact of Canada Thistle Cover on Plant Community Structure in Early Stage Prairie Restoration

Impact of Canada Thistle Cover on Plant Community Structure in Early Stage Prairie Restoration

A field study was conducted in Minnesota to determine if there was a threshold of Canada thistle cover that would impact desirable plant community structure.

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