An emerald ash borer larva overwinters by curling into a J shape inside a channel in an ash tree in Brookfield in 2019. / Photo Credit: Bill McNee, Wisconsin DNR
By Michael Hillstrom, DNR Forest Health Specialist, Fitchburg
Michael.Hillstrom@wisconsin.gov
As winter’s chill persists, Wisconsin Department of Natural Resources (DNR) Forest Health staff members are often asked how cold it needs to get to kill insects, especially invasives.
The answer varies from species to species, but many insects are well adapted to dealing with freezing winter temperatures. Some, such as monarchs, avoid the issue and migrate south for the winter. Others, such as multicolored Asian ladybeetles, annoy us with their presence in our homes and offices as they try to avoid the cold until spring.
Continue reading “Frost’s Bite: How Do Insects Survive Winter?”
The application period is now open for hundreds of internships with the state of Wisconsin, including two positions with the DNR’s Urban Forestry program!
What: 60+ Years of Enhancing the Urban Forests in Wisconsin 
The International Society of Arboriculture (ISA) Certified Arborist Municipal Specialist® credential will now be called 
How do you learn to identify trees in the middle of a Wisconsin winter when most of the leaves are on the ground?
The Great Lake Thriving Communities Grantmaking Partnership will distribute $40 million to organizations working in and for underserved communities throughout the Great Lakes region. All grants will be given to environmental and public health efforts in underserved communities across Region 5 as defined by EPA.