Phomopsis, Black Knot Easily Found In Winter

Posted on by akabelowsky
Phomopsis galls are found on branches of a northern red oak.

This northern red oak has many large Phomopsis galls. / Photo Credit: Wisconsin DNR

By Linda Williams, DNR Forest Health Specialist
Linda.Williams@wisconsin.gov or 920-360-0665

Winter is a great time to admire the structure of trees. When they are without leaves, you can see how the branches are arranged, how large or small the branches are, and if they are fairly straight or contorted. You might also notice some swellings or growths on those branches.

Two types that can really make a statement are Phomopsis and black knot.

Continue reading “Phomopsis, Black Knot Easily Found In Winter” →

Time To Consider A WMA-PFGP Grant Application

Posted on by akabelowsky
Volunteers working to remove invasive plants from a riverside forested area.

Volunteers at a garlic mustard-pulling event on the Montreal River in Iron County, part of a control project planned by a previous WMA-PFGP recipient. / Photo Credit: Ramona Shackleford, Northwoods Cooperative Weed Management Area

By Art Kabelowsky, DNR Outreach and Communications
Arthur.Kabelowsky@wisconsin.gov or 608-335-0167

With an April 1 deadline on the horizon, it’s time for eligible Weed Management Groups (WMGs) to consider applying for a Weed Management Area-Private Forest Grant Program (WMA-PFGP) grant to address invasive forest plants in 2026.

The WMA-PFGP helps eligible groups both by dealing directly with the invasives and by providing education, information and outreach to others. The grants are meant as reimbursements that cover up to 75% of eligible costs, with a 25% match required.

Continue reading “Time To Consider A WMA-PFGP Grant Application” →

Forest Health Specialists Spread The News

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By Art Kabelowsky, DNR Outreach and Communications
Arthur.Kabelowsky@wisconsin.gov or 608-335-0167

A DNR group in a forest discusses forest health issues .

Wisconsin DNR Forest Health specialist Bill McNee presents a hazard tree training talk to other DNR workers at Lizard Mound State Park in 2023. / Photo Credit: Wisconsin DNR

Did any of your trees explode during the recent cold snap? Likely not.

Social media — and some traditional news outlets — grabbed hits and headlines by warning folks that the January cold snap could spark a phenomenon they called “exploding trees.”

But Bill McNee, an Oshkosh-based Forest Health specialist for the Wisconsin Department of Natural Resources (DNR), was there to prune the branches of the fast-growing viral story.

Continue reading “Forest Health Specialists Spread The News” →

Community Spotlight: Introducing The New City Forester For City Of Milwaukee

Posted on by janness

By Elton Rogers, DNR Urban Forestry Coordinator
Elton.Rogers@wisconsin.gov or 414-294-8675

Erin Stoekl was selected in late October to lead the Forestry Services Section for the City of Milwaukee. Erin has worked for City of Milwaukee forestry for 11 years and has been in the industry for 16 years. Over the past three years, she has served as one of three District Managers, overseeing forestry operations for the southern portion of the city. Prior to this position, Erin served for seven years as the Property Maintenance and Compliance Manager.

She holds a Bachelor of Arts from Alverno College and an Associate of Applied Science degree from Milwaukee Area Technical College in Landscape Horticulture. Continue reading “Community Spotlight: Introducing The New City Forester For City Of Milwaukee” →

When Is The Best Time To Prune Trees?

Posted on by janness

By Elton Rogers, DNR Urban Forestry Coordinator
Elton.Rogers@wisconsin.gov or 414-294-8675

To best answer the titular question, I like to start by flipping the question on its head: When is the worst time to prune trees?

To answer this reworded question, we first need to acknowledge that “pruning is wounding.” Anytime you cut off a living portion of a tree, you are doing two main things:

  • Removing photosynthetic material.
  • Creating a potential entry point for decay.

Continue reading “When Is The Best Time To Prune Trees?” →

A New, Intuitive Way To Measure Species Diversity

Posted on by janness

By Dan Buckler, DNR Urban Forest Assessment Specialist
Daniel.Buckler@wisconsin.gov or 608-445-4578

Especially in the wake of emerald ash borer, urban foresters have stressed species diversity as an important goal in the management of local trees. Now there is a new, intuitive way of tracking species diversity by simply counting how many species it takes to make up half of your community’s trees.

This metric is called the top diversity index, or TD-50 index, and was proposed in a 2022 article in Urban Forestry and Urban Greening by Natalie Love and others. The index is deceptively simple — by counting the minimum number of species it takes to comprise 50% of your trees, you have an easy benchmark to improve upon to reduce your reliance on a few species. Continue reading “A New, Intuitive Way To Measure Species Diversity” →

Application Deadline March 1 For Federal Recreational Trail Program (RTP) Grants

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The deadline to apply for federal Recreational Trail Program (RTP) grants has changed from May 1 to March 1 annually.

This change is occurring because the RTP grant program guidance and application will no longer be combined with the Knowles-Nelson Stewardship Local Assistance Program and the Federal Land and Water Conservation Fund grant programs.

The goal of the federal RTP is to encourage the maintenance, rehabilitation and development of trails and trail-side amenities by providing cost-sharing assistance to governmental units and qualified trail organizations. Funding is available for both motorized and non-motorized trails. Continue reading “Application Deadline March 1 For Federal Recreational Trail Program (RTP) Grants” →

Upcoming Trainings

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* These training opportunities are provided as an information service only and do not constitute an endorsement from the Wisconsin Department of Natural Resources (DNR).

See below for information on training topics and events, including tree diseases and treatments, pest management, landscaping, career advancement, invasive species, pruning, volunteer management, new research, partnerships and developing an urban forest management plan. Continue reading “Upcoming Trainings” →

Forest Health Annual Report Hot Off The Presses

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The cover of the 2025 Wisconsin Department of Natural Resources Forest Health Annual Report.

The cover of the 2025 Wisconsin Department of Natural Resources Forest Health Annual Report. / Graphic Credit: Wisconsin DNR

By Art Kabelowsky, DNR Outreach and Communications, Fitchburg
Arthur.Kabelowsky@wisconsin.gov or 608-335-0167

The Wisconsin Department of Natural Resources (DNR) has made its 2025 Forest Health Annual Report ready to view and download.

This year’s edition contains 55 pages of reporting on forest health issues throughout Wisconsin, detailing methods employed by the DNR and other agencies to control pests, diseases and invasive plants.

Continue reading “Forest Health Annual Report Hot Off The Presses” →