By Elly Voigt, DNR Forest Health Lab Technician and Communications Specialist, Eleanor.Voigt@wisconsin.gov
The Wisconsin Department of Natural Resources (DNR) has just released several updated publications, including the annual update of the Heterobasidion root disease and oak wilt factsheets and guidelines. Updated versions can be found on the DNR’s forest health webpage by clicking the links below:
– Heterobasidion root disease factsheet
– Heterobasidion root disease guidelines
– Oak wilt factsheet
– Oak harvesting guidelines
Minor revisions were also made to the environmental cause of tree damage and conifer bark beetle factsheets. Visit the DNR webpage here for other forest health publications.
For more information on forest health, visit the DNR webpage, or talk to your regional Forest Health Specialist.
By Elly Voigt, DNR Forest Lab Technician and Communications Specialist, Eleanor.Voigt@wisconsin.gov
The Wisconsin Department of Natural Resources’ Forest Health team recently completed the 2020 Forest Health Annual Report. The report summarizes impacts from pests, diseases and weather on the health of Wisconsin’s forests. Highlights from 2020 include:
• An update on emerald ash borer in Wisconsin, including newly confirmed counties
• New township detections of oak wilt
• Flooding and tornado damage
• Summary of state nursery studies
For access to the report, visit the link here.
By Mike Hillstrom, DNR Forest Health Specialist, Fitchburg, Michael.Hillstrom@wisconsin.gov or 608-513-7690 and Brian Wahl, DNR Forestry Specialist, Fitchburg, Brian.Wahl@wisconsin.gov or 608-225-7943
During Wisconsin’s first week of 2021, a beautiful weather phenomenon occurred: rime ice. Rime ice forms when the tiny water droplets in fog freeze on trees and other objects. Hoarfrost, a similar phenomenon that occurs without fog, can form when water vapor in freezing air contacts a surface. The best news is that these winter conditions should not concern tree health when we emerge from the winter fog in spring.
Rime ice on a crabapple tree.
Continue reading “Learn More About Rime Ice And Winter Tree Damage”