
An imported willow leaf beetle adult and larvae. / Photo Credit: Wisconsin DNR
By Linda Williams, DNR Forest Health Specialist, Woodruff
Linda.Williams@wisconsin.gov, 920-360-0665
Imported willow leaf beetle (Plagiodera versicolor) is a small, shiny, blue-black beetle as an adult, and the larvae are small, solid black and spikey. Both feed on the foliage of willow and poplar species. Two generations per year are possible.
The invasive pest was first detected in the United States in 1915, likely coming from eastern Europe.




The grants range from $1,000 to $25,000, and grant recipients must match each grant dollar for dollar. A startup grant of up to $5,000 is available for communities that want to start or restart a community forestry program. Grants are awarded to projects that align with state and national goals for increasing the urban forest canopy and the benefits it provides. These grants do not subsidize routine forestry activities. In total, $559,680 is currently available in regular and startup grant funding for 2026.
Trees grow, change and like all living things, eventually decline or die. Sometimes trees are removed from urban areas due to safety concerns, tree health or insufficient space. But when these urban and community trees are viewed not as waste, but as a valuable material resource, their story doesn’t end – it continues.
Do you have a tree inventory but have a hard time keeping it up to date? Or are you interested in inventorying trees from scratch?
Volunteers are needed to be on the ground and up in the tree. Tasks on the ground include helping parents fill out waiver forms, outfitting kids in helmets and saddles and belaying kids up into the tree using pulley systems. Volunteers are needed in the tree to teach kids limb walking, hanging upside down, etc.