Best Management Practices

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!” →

Urban Wildlife Damage Abatement And Control Grants Now Open

Posted on by janness

white tail deerUrban Wildlife Damage Abatement and Control grants help urban areas develop wildlife plans, implement specific damage abatement and/or control measures for white-tailed deer and/or Canada geese. They are available to any town, city, village, county or tribal government with a population density of not less than 125 persons per square mile. This grant provides a 50% cost share up to $5,000 for eligible costs. The application deadline is Dec. 1.

Learn more on the DNR website.

Upcoming Trainings

Posted on by janness

a group of people outside facing an instructor*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 management and planning, urban tree diversity, root pruning, invasive species, urban wood, evergreen diseases, EHAP, the TRAQ program and fall foliage. Continue reading “Upcoming Trainings” →

Community Spotlight: West Allis’ Tree Inventory System

Posted on by janness

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

It was 2021 and the West Allis Forestry Division faced a crisis. For all intents and purposes, its tree inventory was no longer functional. The division had always been a program that kept and used a lot of data, but inefficiencies in the inventory process abounded, and now the software where the data was stored was essentially crashing. The status quo was clearly not working.

But as Winston Churchill apocryphally said, “Don’t let a crisis go to waste.”

Continue reading “Community Spotlight: West Allis’ Tree Inventory System” →

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 utilizing urban wood, leadership in urban forestry, retaining mature trees, the Women’s Rec & Safety Climb, the WAA Fall Seminar, electrical hazards, climate change, tree pathology and diseases and urban forestry public awareness materials.

Continue reading “Upcoming Trainings” →

Networking At Riveredge Nature Center

Posted on by janness

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

Tree managers met at Riveredge Nature Center (RNC) for a networking meeting/field tour at the end of July. RNC is located in Saukville, ground zero for Emerald Ash Borer (EAB) in Wisconsin, which was discovered in 2008.

The indoor portion of the meeting consisted of updates from DNR Urban Forestry and Forest Health staff.  There was also time for open sharing amongst attendees and an overview by Matt Smith (RNC) about what we’d be seeing in the field. Continue reading “Networking At Riveredge Nature Center” →

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, including Z133 updates, urban tree lifespan, maintaining urban trees on private lands, conferences and watering. Continue reading “Upcoming Trainings” →

Monitor Your Trees For Spongy Moth-Related Decline And Mortality

Posted on by akabelowsky
A photo taken June 20, 2025, shows dead and dying oaks near Whitewater Lake in Walworth County, following a period of defoliation and summer drought.

A photo taken June 20, 2025, shows dead and dying oaks near Whitewater Lake in Walworth County, following a period of defoliation and summer drought. / Photo Credit: Wisconsin DNR

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

Property owners are encouraged to monitor their trees for signs of decline and mortality, as the last few years have been marked by drought and spongy moth defoliation.

Landowners who have oak, birch, crabapple, aspen, willow, tamarack and basswood (linden) trees should be particularly watchful, because the caterpillars of this invasive insect prefer these species. Many other tree species are not preferred by the caterpillars and are less likely to be heavily defoliated, but are more likely to die if heavy defoliation should happen.

This article focuses on oak impacts.

The 2021-24 spongy moth outbreak has now collapsed statewide; no defoliation has been observed as of late July 2025. Only a few reports of single caterpillars were received by Wisconsin DNR Forest Health staff. (Note: Parts of Wisconsin may be experiencing a continuing outbreak of different caterpillars known as “oak leafroller” and “larch casebearer.”)

Continue reading “Monitor Your Trees For Spongy Moth-Related Decline And Mortality” →