Care for your woods

Take Action! Look For Gypsy Moth Egg Masses

Article By:  Bill McNee, DNR Forest Health Specialist, Oshkosh
bill.mcnee@wisconsin.gov 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, Bugwood.org

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, Daniel.Buckler@wisconsin.gov 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: https://msu.zoom.us/webinar/register/WN_EjBdXKugQWOZil8Ws23U5A
  • 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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New Oak Wilt Vectors Emergence User Interface Available Online

By Kyoko Scanlon, DNR Forest Pathologist, Kyoko.Scanlon@wisconsin.govor 608-235-7532 and Elly Voigt, DNR Forest Health Communications Specialist and Lab Technician, Eleanor.Voigt@wisconsin.gov or 608-273-6276

Oak wilt is a serious disease that occurs when insects carrying oak wilt fungal spores land on a healthy oak tree’s fresh wound. To prevent oak wilt infections, it is important to avoid pruning, wounding and harvesting oaks when these insects are abundant, generally April through July.

Predicting exactly when these insects start to emerge in the spring can be difficult as their emergence is highly weather-dependent, and spring weather varies significantly from year to year.

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1000 Friends Of Wisconsin’s Leafing Out Webinar Series

Leafing Out, Episode 4: Selecting Your Tree, Fruit Trees with Paul Schwabe

Thursday, March 25, 2021, 12:00-1:00 PM

This webinar has been produced in collaboration with the Dane County Tree Board

Join 1000 Friends and Paul Schwabe from Johnson’s Nursery in Menomonee Falls to hear the secrets to a bountiful fruit tree. Paul is a sales rep at Johnson’s Nursery and has many years of wisdom to share with us.

Paul will cover the optimal site conditions for fruit trees and then grow your knowledge of apple and peach trees during his presentation. When his talk is finished, Paul will be available for any of your fruit tree questions.

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Fall Workshop Series Now Available on Video

The Wisconsin Department of Natural Resources (DNR) Urban Forestry and UW-Madison, Division of Extension Fall 2020 Workshop Series is now available for viewing on YouTube. Use the links below to watch the videos:

Please complete the survey in the comments section on YouTube after viewing each video.