Care for your woods

‘Exploding Trees’ Face Long-term Impacts

Posted on by akabelowsky
A long vertical wound in a tree trunk caused by deep freezing.

Cracked bark and wood creates a long vertical wound typical of the phenomenon commonly called “exploding trees.” / Photo Credit: Wisconsin DNR

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

This past winter, “exploding trees” went viral on social media. Many news outlets followed up with a more realistic explanation of the dramatically named phenomenon, pointing out that while the bitter cold can cause sudden cracks to form on trees, the trees don’t truly explode.

But what happens to those damaged trees as we warm up and move into the growing season?

Continue reading “‘Exploding Trees’ Face Long-term Impacts” →

Huge White Grubs Found In Firewood, Rotting Logs

Posted on by akabelowsky
Closeup of large white grub larvae discovered inside logs being split for firewood.

Large white grub larvae discovered while splitting firewood. The insects are living in a piece of firewood with a lot of decay. / Photo Credit: Wisconsin DNR

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

Hermit flower beetles (Osmoderma spp.) are very large scarab beetles, sometimes called leather beetles.

Three Osmoderma species can be found in Wisconsin, though none are common. Adult beetles look big and beefy but are harmless, eating a little pollen, feeding on ripe fruit and sipping nectar and tree sap during their adult life.

Continue reading “Huge White Grubs Found In Firewood, Rotting Logs” →

Jumping Worms A Threat To Gardens And Forests

Posted on by akabelowsky
Closeup of a jumping worm on soil.

Closeup of a jumping worm (Amynthas agrestis). / Photo Credit: Wisconsin DNR

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

Invasive jumping worms are worrisome for several reasons, but here’s one of the main ones: It can be difficult to tell you even have them until they’ve already done their damage.

That makes this time of year important, because the best way to avoid damage from jumping worms, which can be substantial and long-lasting, is to prevent them from getting into your garden, yard or forestland in the first place.

Continue reading “Jumping Worms A Threat To Gardens And Forests” →

Land And Water Conservation Fund Program Grant Application Due May 1, 2026

Posted on by janness

DNR LogoThe Wisconsin Department of Natural Resources (DNR) is accepting applications for the Federal Land and Water Conservation Fund (LWCF) Grant Program through May 1, 2026. The DNR will consider all complete applications received by this date.

Eligible applicants include towns, villages, cities, counties, tribal governing bodies and school districts.

Application materials are located on the DNR’s website. Please contact your regional Project Manager prior to submitting an application.   Continue reading “Land And Water Conservation Fund Program Grant Application Due May 1, 2026” →

Submit Proposals For Partners In Community Forestry Conference

Posted on by janness

Arbor Day Foundation LogoThe Partners in Community Forestry Conference is currently seeking speaking proposals for the upcoming conference Nov. 18-19 in St. Louis.  Any passionate speakers, community leaders and learners are encouraged to send a proposal submission. These speeches are an opportunity to share your expertise and passion about community forestry with others. The topics for this year’s speaker proposals include: Continue reading “Submit Proposals For Partners In Community Forestry Conference” →

Upcoming Training

Posted on by janness

Photo Credit: Wisconsin DNR

* 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 training on urban forestry basics, tree risk fundamentals in Spanish, plant diseases and pests, invasive species, student apprenticeships, nut trees and other urban forestry resources. Continue reading “Upcoming Training” →

Look For Spongy Moth Egg Masses And Take Action

Posted on by akabelowsky
Closeup of a person scraping spongy moth egg masses into a cup.

A putty knife, plastic knife or similar object can be used to gently scrape spongy moth egg masses into a cup of soapy water. The water can be discarded after two days. / Photo Credit: Wisconsin DNR

By Bill McNee, DNR Forest Health Specialist, Oshkosh
Bill.McNee@wisconsin.gov

The Wisconsin Department of Natural Resources (DNR) encourages property owners to examine their trees for spongy moth egg masses and determine whether control measures are needed this spring.

Property owners who have oak, birch, crabapple, aspen, willow and linden (basswood) trees should be particularly watchful because the caterpillars of this invasive insect prefer these species. However, they will feed on many other kinds of trees and shrubs.

Continue reading “Look For Spongy Moth Egg Masses And Take Action” →

Upcoming Training

Posted on by janness

group of people listening to a speaker in the woods* 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 shade trees, fruit trees, chainsaw certification, tree diseases and pests, pruning and public perspectives on trees. Continue reading “Upcoming Training” →

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?” →

Upcoming Trainings

Posted on by janness

* 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” →