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.
Continue reading “New Oak Wilt Vectors Emergence User Interface Available Online”

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:
The Wisconsin Department of Natural Resources (DNR) Urban Forestry program will have a virtual booth at the 2021
In recent years, Cedarburg’s urban forest was declining. From 2017-2019, less than one-third of removed trees were replaced. “Development, storms, insects (especially emerald ash borer), and disease have reduced the City’s tree canopy by as much as 300 trees… trees which, at present, are not being replaced,” said Kevin Westphal, Cedarburg parks and forestry superintendent, in January 2020.