Best Management Practices

Now Is Time To Seek Out Spongy Moth Egg Masses

Posted on by akabelowsky
Large spongy moth egg masses on a tree main stem.

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

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

It certainly has been chilly in recent weeks, but spring is coming. When the weather warms up, the annual return of spongy moth caterpillars will begin.

The overall spongy moth population is currently low in Wisconsin. However, egg mass numbers may remain high enough to cause nuisance problems and heavy tree defoliation on individual trees or in small areas.

There’s a way for property owners to help keep the population down: Get out now to locate and properly dispose of spongy moth egg masses, which were produced by adult moths last summer. Each spongy moth egg mass contains hundreds of eggs that will hatch into hungry, leaf-eating caterpillars in the spring.

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

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” →

Repurpose Your Holiday Tree!

Posted on by janness

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

To say that working on a Christmas tree farm in high school led me into forestry would be a case of significant historical revisionism. Still, that experience swam in the same waters as reading Lord of the Rings, going on family vacations to the mountains, having a nearby municipal forest and other things that showed me that trees were the way.

Since then, I have increasingly appreciated holiday trees and other green things brought into households, not (just) in the harbinger-of-gifts way, but as reminders of life against a cold, seemingly bleak background. “Things will get better,” these green things announce. “Just wait!” Continue reading “Repurpose Your Holiday Tree!” →

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 ISA certification exam preparation, plant propagation, winter tree identification, urban forest restoration, research trends and electrical hazards. Continue reading “Upcoming Trainings” →

Arbor Day Seedling Orders Open To Fourth-graders

Posted on by akabelowsky

By Wisconsin DNR

A worker plants a red pine seedling provided by the Wisconsin Department of Natural Resources.

A worker plants a red pine seedling provided by the Wisconsin Department of Natural Resources. / Photo Credit: Wisconsin DNR

The Wisconsin Department of Natural Resources (DNR) is offering free tree seedlings to every fourth-grade student in Wisconsin as part of its annual Arbor Day tree planting program.

Wisconsin fourth-grade principals, teachers and homeschoolers can now place seedling orders and coordinate delivery by completing the 2026 Arbor Day application by March 16, 2026.

Continue reading “Arbor Day Seedling Orders Open To Fourth-graders” →

Go-To Online Resources For Urban Forestry

Posted on by janness

By Allen Pyle, UW-Extension Horticulture Outreach Specialist and Jay Dampier, DNR IRA Grant Coordinator, Jason.Dampier@wisconsin.gov or 920-765-1935

Reliable and up-to-date research-based information is vital for tree care professionals and urban foresters to make sound, scientific management decisions. To make trusted resources more accessible, UW-Extension’s Horticulture Program and Wisconsin DNR’s Urban Forestry Program have developed this curated selection of useful webpages with free information and resources for urban forestry professionals and community tree managers. Continue reading “Go-To Online Resources For Urban Forestry” →

After The Ice: Urban Forestry’s Role In Community Recovery And Resilience

Posted on by janness

By Lee Mueller, Davey Resource Group, Inc., Kevin Sayers, Michigan Department of Natural Resources and Paul Hickman, Urban Ashes

*Republished with permission from the authors

ice covered street trees

Photo Credit: MI DNR

Cold weather is just around the corner, so now is the time to develop or revisit winter storm response plans. Ice storms are a recurring challenge in the Midwest. Freezing rain can add substantial weight to limbs, causing even healthy trees to snap. Ultimately, events like this can offer opportunities to reassess communities’ approaches to tree management and build stronger, more resilient urban forests. Continue reading “After The Ice: Urban Forestry’s Role In Community Recovery And Resilience” →

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 urban wood, invasive species, tree rot and decay, beech leaf disease, connecting people to urban forestry and research presentations on pruning regimens, tree science and solar power. Continue reading “Upcoming Trainings” →

Don’t Stop Watering Your Trees Yet!

Posted on by janness

By Brian Wahl, DNR Urban Forestry Coordinator, Brian.Wahl@wisconsin.gov or 608-225-7943

A simple act, a science and an art, but bottom line – all trees need water (even in autumn)

It’s a very dry start to autumn this year. Heck, it’s been a dry second half of summer, but thanks to our lovely wet spring, we aren’t in a drought yet. However, areas of the state are “abnormally dry” according to the U.S. Drought Monitor. So be sure to get out there and water your newly planted trees! If you have the time, your established trees would appreciate a cool drink of H20 as well.

screenshot of WI drought map

Continue reading “Don’t Stop Watering Your Trees Yet!” →