By: Bill McNee, DNR Forest Health Specialist, Oshkosh
bill.mcnee@wisconsin.gov or 920-360-0942
Three spongy moth egg masses on a branch in Walworth County. Photo Credit: Bill McNee, Wisconsin DNR
Now that spongy moth* (formerly known as gypsy moth) egg laying is complete for 2022, it’s a good time to look for and dispose of egg masses produced by adult moths over the past two months.
Spongy moth egg masses are tan-colored lumps about the size of a nickel or quarter, and are found on trees, buildings and other outdoor objects. They may also be found in protected places such as firewood piles and birdhouses. Newly produced egg masses will feel firm and appear darker in color than older egg masses, which appear faded, feel spongy and do not contain viable eggs. The current-year egg masses will not hatch until next spring.
In 2022, Wisconsin’s spongy moth population grew for a third consecutive summer due to favorable weather conditions and limited caterpillar mortality from diseases. The outbreak was most dramatic in opposite ends of the state. In southern and southeast Wisconsin, several thousand oak-dominated acres were heavily defoliated and very large numbers of property owner reports were received by DNR staff. In Bayfield County, about 80,000 acres of rural defoliation was reported from aspen-dominated forests. Smaller patches of defoliation were also reported from several other counties. Continue reading “Look For Spongy Moth Egg Masses – Larger Outbreak Possible in 2023”
Do you have a tree inventory but have had a hard time keeping it current, or you’re interested in inventorying some trees of your own? The Wisconsin Department of Natural Resources (DNR) is funding several accounts for communities or organizations to edit data within the 
Wisconsin’s urban forests provide a wide range of ecological, economic and social benefits. Urban areas contain nearly 27 million trees with an estimated total replacement value of almost $11 billion. Many don’t realize all the services urban forests provide. They reduce air pollution, mitigate storm water runoff, conserve energy, provide wildlife habitat, increase property values, and attract businesses, tourists and residents. They even improve public health and well-being. The Wisconsin DNR’s Urban Forestry Team seeks to maximize these benefits derived from our state’s community tree canopies. 
After much deliberation, WI DNR Urban Forestry has decided to postpone the Community Tree Management Institute (CTMI) for one year. The health and safety of others is paramount. Due to the pandemic, it’s just not feasible to come together in person for this training. Group interaction and networking are an integral part of the CTMI experience, so we will look forward to coming together in the fall of 2021 with the start of the next CTMI class (exact dates to be determined). 
With thousands of trees on their properties, municipalities and other urban ownerships sometimes need to remove a large volume of trees at once, such as after an insect or disease outbreak (i.e., emerald ash borer) or a catastrophic weather event (wind/tornadoes or ice/snow damage). When this need arises, what are the options available to remove these trees efficiently, safely, cost effectively and quickly?