White, cottony hemlock woolly adelgid egg sacs on a hemlock branch. / Photo Credit: Bill McNee, Wisconsin DNR
By Michael Hillstrom, DNR Forest Health Specialist, Fitchburg; Michael.Hillstrom@wisconsin.gov
Hemlock woolly adelgid (HWA) and balsam woolly adelgid (BWA) are invasive, aphid-like insects that cause tree mortality in North America. Neither has been found in Wisconsin so far, but they are likely to arrive at some point, as they have been confirmed in Michigan.
HWA (Adelges tsugae) is an invasive, sucking insect pest of hemlock trees. The white, cottony egg sacs of HWA can be seen on the undersides of hemlock branches at the base of needles year-round. HWA saliva enters the tree while feeding. The saliva is toxic and causes needle drop and twig dieback, progressing to tree mortality in 4-10 years.
The 
Tree City USA Interactive Map
‘Winter burn’ refers to a type of damage to evergreen foliage that typically occurs over winter. Common symptoms are browning and dying from the tips of the foliage inward. Several factors cause winter burn on evergreens, including winter ‘thaws’ while the ground is frozen, dry soil in autumn, a long period of very cold temperatures, winter sun on evergreen foliage or drying winter winds, poor siting of susceptible plants, recent planting/transplanting and the individual plant’s susceptibility. Frequently affected plants include yews, junipers, boxwood, arborvitae, rhododendrons, dwarf Alberta spruce and hemlock. 
Urban Wildlife Damage Abatement and Control grants help urban areas develop wildlife plans, implement specific damage abatement and/or control measures for white-tailed deer and/or Canada geese. They are available to any town, city, village, county or tribal government in an urban area. This grant provides a 50% cost share up to $5,000 for eligible costs. The application deadline is Dec. 1, 2024. 
Employee attitudes and well-being improve with exposure to nature. Think about it. Every weekday we commute to work, only to be met by a dark cubicle in shades of beige and grey. Ever wonder why your mood starts to match the walls? It’s because the workplace environment contributes to employee health. We’ve known this to be true (anecdotally) for a long time, but mounting scientific evidence proves our urban and community forests have beneficial effects on employee performance. 
The Wisconsin Department of Natural Resources (DNR) announced the recipients of the Urban Forestry Catastrophic Storm Grants to assist with damage sustained during statewide extreme storm events that took place June 21-25, 2024. 
The trees on school properties mirror those of the surrounding urban forest in composition but not in coverage.
*These training opportunities are provided as an information service only and does not constitute an endorsement from the WI DNR.