A group of elm leaves shows varying levels of wrinkling and curling, due to feeding by wooly elm aphids on the underside of the leaves. / Photo Credit: Linda Williams, Wisconsin DNR
By Linda Williams, DNR Forest Health Specialist, Woodruff
Linda.Williams@wisconsin.gov or 920-360-0665
Woolly elm aphids (Eriosoma americanum) are a minor pest of American elm. The aphids’ feeding causes leaves to curl at the edges and develop a characteristic wrinkled appearance.
Uncurling the leaves exposes many pale gray aphids on the underside of the leaves, which are protected by the rolled leaf.
Continue reading “Woolly Elm Aphid Causes Elm Leaves To Curl”
Beginning July 1, 2025, cities, villages, towns, counties, tribes and 501(c)(3) nonprofit organizations in –or conducting their projects in – Wisconsin can apply for a regular or startup 2026 Wisconsin Department of Natural Resources (DNR) Urban Forestry grant. The total 2026 available funding is $559,680, with a possible release of $139,920 of catastrophic storm reserve to fund a second round in March 2026. 
When your newly planted trees are getting comfortable in their new homes, you’ve pulled the splinters from your hands and you find yourself at a desk asking yourself, “What now?”, we have an answer for you.
With recent storms passing through Wisconsin, communities may still be working on clean-up. Depending on the intensity of the storms and the condition of the trees, damage from high winds, heavy rainfall, hail and lightning can be quite severe. Cracked or broken branches, trunk damage and root failure are some of the main concerns, but also the risk and liability of damage to people and property. 
