Statewide Forest Health

Tune In: Forest Health Team In The Media

Posted on by akabelowsky
Photo showing DNR Forest Health specialist Paul Cigan looking for various species of invasive plants during a visit to a bog at the Wisconsin Department of Natural Resources' Kemp Research Station

Paul Cigan looks for various species of invasive plants during a visit to a bog at the Wisconsin Department of Natural Resources’ Kemp Research Station on Tuesday, June 25, 2024. / Photo Credit: Art Kabelowsky, Wisconsin DNR

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

Paul Cigan, the Wisconsin Department of Natural Resources’ (DNR) forest health specialist for the northwest zone, recently appeared on the Ventures of the Land podcast, hosted by George Atwell, to discuss oak wilt’s past, present and future in Wisconsin.

The talk included details on how and when the invasive fungal disease arrived in the state, how it attacks oak trees and methods landowners can use to manage the disease.

Continue reading “Tune In: Forest Health Team In The Media” →

Mary Bartkowiak Retires As Forest Invasive Plant Coordinator

Posted on by akabelowsky
Photo showing Mary Bartkowiak, the Wisconsin Department of Natural Resources' recently retired Forestry Invasive Plants Coordinator, giving a presentation on invasive plants at the University of Wisconsin's Kemp Natural Resources Station in Woodruff.

Mary Bartkowiak, the Wisconsin Department of Natural Resources’ Forestry Invasive Plants Coordinator, gives a presentation on invasive plants at the University of Wisconsin’s Kemp Natural Resources Station in Woodruff on June 25. / Photo Credit: Art Kabelowsky, Wisconsin DNR

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

It seems quite fitting that a natively grown expert has spent much of the last 15 years of her career fighting the expansion of invasive plant species in Wisconsin.

Mary Bartkowiak, a Wisconsin native who joined the Department of Natural Resources (DNR) in 2010 and has served as the Forest Invasive Plants Coordinator since 2020, announced her retirement in February.

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Is That A Crack In My Tree?

Posted on by janness

By Olivia Witthun, DNR Urban Forestry Coordinator
Olivia.Witthun@wisconsin.gov or 414-750-8744

tree with frost crackWisconsin winters with subzero weather can create problems for our trees. Frost cracks are one of those problems we’re seeing an uptick of lately. These longitudinal openings can run the entire length of the trunk, often extend deep into the wood, and permanently damage a tree. In wintertime, the tree may even look like it’s splitting in half! Then warmer weather comes, and the crack seems to close, repeating this process annually. Over time, frost cracks may even develop a raised area where callus tissue develops in an attempt to close over the wound, only to reopen again next winter. Continue reading “Is That A Crack In My Tree?” →

A Wonderful Winter Display: Phomopsis Galls

Posted on by akabelowsky
Phomopsis galls are plentiful on branches of a 120-year-old red oak tree in Clark County, Wisconsin, in 2024.

Phomopsis galls are plentiful on branches of a 120-year-old red oak tree in Clark County, Wisconsin, in 2024. / Photo Credit: Kris Wimme, retired Wisconsin DNR forester

By Alex Hornung, DNR Forest Health Specialist, Plover
Alexandra.Hornung@wisconsin.gov

It is the perfect time of year to be on the lookout for galls – woody growths or swellings on tree branches that are typically oblong in shape and of varying sizes.

They can often be found on small branches, but occasionally they can affect large branches or even the main stem. Galls can occur for several reasons, ranging from fungi to bacteria to insect activity.

One type, Phomopsis gall, can be particularly impressive to see. Galls formed due to this native fungus mostly occur on oak, hickory and maple trees in Wisconsin.

 

Continue reading “A Wonderful Winter Display: Phomopsis Galls” →

Weed Management Area Grant Deadline Approaching

Posted on by akabelowsky
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.

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 Wisconsin DNR

The April 1 application deadline for Weed Management Area-Private Forest Grant Program (WMA-PFGP) grants is coming up. There is still time to apply for funding to help you control invasive plants on your forested land in 2025.

Controlling invasive plants on your forested property can be a challenging and costly endeavor. WMA-PFGP grants help to make this process a little easier for its recipients.

Continue reading “Weed Management Area Grant Deadline Approaching” →

Now Is Time To Seek Out Spongy Moth Egg Masses

Posted on by akabelowsky
Large egg masses are seen on a tree at the Kettle Moraine State Forest-Southern Unit in 2021.

Large egg masses are seen on a tree at the Kettle Moraine State Forest-Southern Unit in 2021. / Photo Credit: Bill McNee, Wisconsin DNR

By Bill McNee, DNR Forest Health Specialist, Oshkosh;
Bill.McNee@wisconsin.gov or 920-360-0942

It might be a bit chilly these days, but spring is coming. When the weather warms up, the annual return of spongy moth caterpillars will begin.

There’s a way for landowners to make a dent in the population of the hungry caterpillars: Get out now to locate and properly dispose of spongy moth egg masses, produced by adult moths last summer.

Continue reading “Now Is Time To Seek Out Spongy Moth Egg Masses” →

Make Plans Now To Fight Spongy Moth In 2025

Posted on by akabelowsky
A photo showing large egg masses on a tree at the Kettle Moraine State Forest-Southern Unit in 2021.

Large egg masses are seen on a tree at the Kettle Moraine State Forest-Southern Unit in 2021. / Photo Credit: Bill McNee, Wisconsin DNR

By Bill McNee, DNR Forest Health Specialist, Oshkosh
Bill.McNee@wisconsin.gov or 920-360-0942

Part Two of a report on spongy moth in Wisconsin in 2024 and 2025. Part One was published in December.

The Wisconsin Department of Natural Resources (DNR) is encouraging property owners to examine their property for spongy moth egg masses and plan for action this spring if needed. Each spongy moth egg mass contains hundreds of eggs that will hatch into hungry, leaf-eating caterpillars this spring. Large numbers of these invasive caterpillars can be a tremendous nuisance that may cause tree mortality.

Continue reading “Make Plans Now To Fight Spongy Moth In 2025” →

It’s A Good Time To Work On Oak Trees

Posted on by akabelowsky
A person prunes a tree during the winter months.

Winter is an ideal time to perform pruning and trimming work on oak leaves. / Photo Credit: Wisconsin DNR

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

Winter is an ideal time to perform trimming, cutting and brush removal work on and near oak trees.

For one thing, it’s a low-risk period for the trees to be infected with oak wilt, a fungal disease spread by beetles. When a red oak is infected with oak wilt, it will die that year; the disease also stresses trees in the white oak group, often fatal with bur oaks and swamp white oaks.

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2024 Forest Health Annual Report Published

Posted on by akabelowsky
The cover of the Wisconsin Department of Natural Resources' 2024 Forest Health Annual Report.

The cover of the Wisconsin Department of Natural Resources’ 2024 Forest Health Annual Report. / Graphic Credit: Wisconsin DNR

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

Hot off the digital presses, the Wisconsin Department of Natural Resources (DNR) has made its 2024 Forest Health Annual Report ready for review and download.

This year’s edition contains 58 pages of reporting on forest health issues throughout Wisconsin, detailing methods employed by the DNR and other agencies to control pests and diseases.

Continue reading “2024 Forest Health Annual Report Published” →

Tree Disease Maps Have Migrated

Posted on by akabelowsky
The Wisconsin web map for Heterobasidion root disease, available through ArcGIS Online.

The Wisconsin web map for Heterobasidion root disease, available through ArcGIS Online. / Map Credit: Paul Cigan, Wisconsin DNR

By Paul Cigan, DNR Forest Health Specialist, Hayward
Paul.Cigan@wisconsin.gov or 715-416-4920

The Wisconsin Department of Natural Resources (DNR) Forest Health program hosts two interactive web maps on its webpage:

Heterobasidion Root Disease

Oak Wilt Seasonal Harvesting Opportunities

Continue reading “Tree Disease Maps Have Migrated” →