Care for your woods

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.

Oak Wilt Vectors Emergence User Interface Now Available

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

Oak wilt is a serious disease of oaks that spreads to new areas when insects carrying oak wilt fungal spores land on a fresh wound of a healthy oak tree. To prevent oak wilt infections, it is important to avoid pruning, wounding and harvesting of oaks when these insects are abundant.

Predicting when these insects emerge in spring can be difficult as their emergence is highly weather-dependent and spring weather varies significantly year to year. The good news is that a new online interface is now available to provide users with localized information about the emergence status of the two most important insects that transmit oak wilt in Wisconsin. Because the interface uses a degree-day model constructed from insect trapping data and actual weather data, it is useful to refine the beginning of the periods when pruning, wounding and harvesting of oaks should be avoided.

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Featured Species: Washington Hawthorn

T. Davis Sydnor, The Ohio State University, Bugwood.org

Scientific Name: Crataegus phaenopyrum

Native to: East Central U.S. (southern Illinois, Kentucky, Tennessee and southeastern Missouri)

Mature Height*: 20 to 30 feet

Spread*: 20 to 30 feet

Form: upright oval to rounded vase shape; has 1 to 3-inch thorns (some cultivars have fewer thorns)

Growth Rate*: slow-moderate

Foliage: alternate, simple, triangular-shaped, three to five-lobed, doubly serrate margin and dark green in summer

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New emerald ash borer county detections: an update from DATCP and DNR

The Wisconsin Department of Agriculture, Trade and Consumer Protection (DATCP), in partnership with the Wisconsin DNR, has detected emerald ash borer in four new counties (Dunn, Oconto, Pepin and Shawano). Please read this DATCP article for more information.

Adult emerald ash borer beetle.

Adult emerald ash borer beetle.

If you are a landowner and have questions about ash trees in your woodlot, contact your local DNR forester using the Forestry Assistance Locator.  

Gypsy moth populations rebound in 2020 – look for egg masses this fall

By Bill McNee, forest health specialist, Oshkosh, bill.mcnee@wisconsin.gov, 920-360-0942

The summer of 2020 saw a major rebound of the gypsy moth population after several years of weather conditions that were unfavorable for the non-native, defoliating pest. A mild winter and average summer temperatures/precipitation during the caterpillar stage were all favorable for a population increase.

Gypsy moth egg masses are tan-colored lumps about the size of a nickel or quarter.

Female moth laying eggs on tree trunk.

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