Care for your woods

International Society of Arboriculture Trees Are Good Brochures Available For Download

Now available for download are the Trees Are Good brochures from the International Society of Arboriculture. Brochures contain educational information for tree owners on best management practices throughout the life of a tree, from tree selection and planting to mature tree care and risk assessment. They also serve as a helpful tool to generate greater awareness of the benefits that trees provide in our communities.

Brochure topics include:

  • Benefits of Trees
  • Tree Values
  • Tree Selection
  • Buying High Quality Trees
  • Recognizing Tree Risk
  • Avoiding Tree Damage during Construction

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What Accounts For Your Neighborhood’s Tree Canopy?

By Dan Buckler, DNR Urban Forest Assessment Specialist, Madison, or 608-445-4578

When I returned to my hometown neighborhood in northeast Ohio this past August, I was delighted to rekindle my friendship with so many trees that I have known most of my life. There are, of course, the Norway maples and crabapples and blue spruces found in maintained spaces throughout eastern America. One also finds a fair number of sugar maples and Ohio buckeyes. But despite apparently living in a democracy, red oak is king of my neighborhood.

During this visit, I did something that I don’t always do; I looked down. What I saw concerned me. Or, rather, what I didn’t see. Few trees had been planted in a decade, and fewer still will grow into canopy-replacing size. Windstorms were slowly bleeding the neighborhood of its great oak and maple trees, but there were no longer any kings or queens being coronated.

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Got Buckthorn?

Article By: Jaqi Christopher, DNR Forest Invasive Plant Specialist, Rhinelander,

Common buckthorn with green leaves and dark purple/black berries.

Common Buckthorn leaves with berries. Notice the prominent leaf veins and small thorns at the end of the branches.
Photo Credit: Wisconsin DNR

You can find buckthorn just about anywhere these days. It can sneak into the tidiest of gardens, as well as woodlots and forests. It aggressively outcompetes native plants and even tricks wildlife into spreading it to new areas. For example, birds are enticed to eat the berries, but buckthorn berries have a laxative effect, robbing birds of nutrition and ensuring the seeds are spread quickly across the landscape. 

There are two species of buckthorn in the state: common buckthorn and glossy buckthorn. The plants are similar in appearance and equally harmful to native ecosystems. Common buckthorn and glossy buckthorn grow to be 20-25 feet tall. Glossy buckthorn has round, glossy leaves with prominent leaf veins and a smooth margin, while common buckthorn has dull green leaves with small teeth on the margin. The branches of common buckthorn will have a small thorn at the tip of the twig. The bark is similar in both species, being rough and flakey. Native cherry and plum trees have similar bark, but buckthorn can be identified by leaf appearance andby cutting into the bark to expose the bright yellow and orange wood underneath.

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Take Action! Look For Gypsy Moth Egg Masses

Article By:  Bill McNee, DNR Forest Health Specialist, Oshkosh or 920-360-0942

In 2021, gypsy moth populations increased for a second consecutive summer due to favorable weather conditions. Populations typically increase with an average or mild winter, below average spring precipitation and above average May through June temperatures.

Regional variation in weather can result in significant differences in populations. If weather conditions are favorable again in 2022, the most noticeable increase in caterpillar numbers would likely occur in southern counties, where conditions were driest during this past spring and summer.

Populations experience the fastest growth rate and are first noticed on:

  • Dry sites with sandy soil and abundant oak
  • Mowed lawns with preferred tree species (oak, crabapple, birch, etc.)
  • Large oaks (bur, in particular) with rough bark, especially on or adjacent to mowed lawns
Five small gypsy moth egg tan masses on a single tree branch in Walworth County.

Gypsy moth egg masses found in Walworth County in fall 2021.
Photo Credit: Gypsy moth egg masses KMSU













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Resources For Storm-Damaged Trees

Credit: Joseph O’Brien, USDA Forest Service,

Did your community experience damage from the storms that went through the state recently? You may find these resources useful. The links below could also be posted on municipal websites to direct homeowners to more information.

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Tree Inventory Accounts Available

By Dan Buckler, DNR Urban Forest Assessment Specialist, Madison, or 608-445-4578

Do you have a tree inventory but have had a hard time keeping it current, or you’re interested in inventorying some trees of your own? The Wisconsin Department of Natural Resources (DNR) is funding several accounts for communities or organizations to edit data within the Wisconsin Community Tree Map, a compilation of tree inventories from around the state. The map shows where trees are located and includes information about each tree, such as diameter, health condition and street address.

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Updated Version Of The Tree Owner’s Manual Now Available

The latest version of the USDA Forest Service’s Tree Owner’s Manual is now available online here (link). This publication is a concise yet comprehensive guide to tree care basics. Playfully modeling itself on owner’s manuals that accompany automobiles and appliances, the manual covers the following topics:

  • Model Information and Parts Diagram (broad-leaf trees, palms and conifers)
  • Packaging (balled and burlapped, containerized, and bare root)
  • Installation (planting)
  • Maintenance Instructions (watering, mulching, pruning, and more)
  • Protecting Trees from Construction Damage

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1000 Friends Of Wisconsin’s Leafing Out Webinar Series

Leafing Out, Episode 6: Small Insects Can Cause Big Tree Problems with August Hoppe

Thursday, May 20th, 2021, 6:30-7:30 p.m.

This webinar has been produced in collaboration with the Hoppe Tree Service

Join 1000 Friends and August Hoppe, from Hoppe Tree Service to learn about the insects that might be bugging your trees.

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1000 Friends Of Wisconsin’s Leafing Out Webinar Series

Leafing Out, Episode 5: Common Tree Diseases With Brian Hudelson

Thursday, April 15, 2021, 12:00-1:00 PM

This webinar is produced in collaboration with the Dane County Tree Board.

Join 1000 Friends and Brian Hudelson, the Director of Diagnostic Services at the UW-Madison Plant Disease Diagnostics Clinic, to learn about the most common diseases impacting our urban trees. Brian will teach us the most prevalent tree diseases and share methods for their management and prevention.

We’ll stop periodically throughout the presentation so Brian can answer any specific questions you have. Brian is a frequent guest on the Larry Meiller Show on WPR and is excited to answer any of your tree disease questions. We encourage you to send questions in ahead of time to be sure we answer them.

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“Everything You Need To Know In Half An Hour” Webinar Series

This spring EAB University is starting a new series of 30-minute All You Need to Know videos.

The webinars run from late April to mid-May and cover gypsy moth, spotted lanternfly, emerald ash borer, Asian longhorned beetle, thousand cankers disease and hemlock wooly adelgid. Scroll down for dates, speakers, abstracts and registration info.

Gypsy moth: Everything you need to know in half an hour

  • Speaker: Cliff Sadof, Elizabeth Barnes of Purdue University, Department of Entomology, and Carrie Tauscher of Indiana Department of Natural Resources, Division of Forestry
  • Date: April 28, 2021, 11 a.m. Eastern
  • Registration:
  • Abstract: When does gypsy moth kill trees? When don’t you have to worry? Learn the latest in key information about gypsy moth including management, current distribution, preventing spread, basic biology, host-plant identification and more.

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