Two photos of the same spot on a tree in Door County, showing Heterobasidion root disease fruiting bodies (left) and the basal wound beneath them (right). / Photo Credits: Bill McNee, Wisconsin DNR
By Bill McNee, DNR Forest Health Specialist, Oshkosh;
Bill.McNee@wisconsin.gov or 920-360-0942
Heterobasidion root disease (HRD), formerly known as annosum root rot, was recently found in Door County for the first time.
In mid-September, several suspected HRD fruiting bodies were spotted in a white spruce plantation on privately owned land in the town of Sevastopol. One cluster of fruiting bodies located at the base of a dead spruce was confirmed as Heterobasidion irregulare, the fungal pathogen that causes HRD. The other fruiting bodies were identified as a native decay fungus that has a similar appearance.
Continue reading “Heterobasidion Root Disease Found In Door County”
‘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. 
*These training opportunities are provided as an information service only and does not constitute an endorsement from the WI DNR.
Join us for a two-part workshop on the value and uses of bare root trees and how to use gravel beds to hold and maintain bare root stock before it is planted. Part one will be delivered via Zoom on Friday, Sept. 20. Part two will be an in-person field day visit to an operating gravel bed. You will select one of the six locations around the state during registration. ISA CEUs will be available for both parts.
Southeastern Wisconsin Invasive Species Consortium is teaming up again with 
The Arbor Day Foundation is thrilled to announce the 2024 Partners in Community Forestry Conference and Alliance for Community Trees Day will be held in Chicago, Illinois Nov. 20-21.
Join the Wisconsin Arborist Association (WAA) for its summer conference. It will be held at the University of Wisconsin-River Falls University Center in River Falls, Wisconsin, on Friday, July 26, 2024. The program will have a little something for everyone, Planting for the Future and feature two educational tracks, one indoors and one outdoors.
Many residents and land managers in southeastern Wisconsin search for effective and efficient practices to control exotic invasive plants in our natural areas. The Southeastern Wisconsin Invasive Species Consortium is teaming up again with