By Linda Williams, DNR Forest Health Specialist, Woodruff, Linda.Williams@wisconsin.gov or 920-360-0665
Oak timberworm, Arrhenodes minutus, is a primitive weevil that can cause defects and degrade in red and white oak timber. They can also infest elm, poplar and beech. Egg-laying females will seek out trees that are damaged, wounded, nearly dead or recently dead. After the eggs hatch, the larvae bore across the grain through the tree then “U-turn” back across the grain to the point of origin, taking two or three years to complete their life cycle and creating a lumber defect called a wormhole. When infested wood is split for firewood, the weevils may emerge in homes or garages if they had already pupated when the firewood was split.
Male oak timberworm on a Northern red oak that was damaged in a storm.
Cities, villages, towns, counties, tribes and 501(c)(3) nonprofit organizations in or conducting their project in Wisconsin are encouraged to apply for a regular or startup 2022 Department of Natural Resources Urban Forestry Grant!
Registration is now open for UW-Madison, Division of Extension’s annual Urban Forestry Workshop, held Aug. 19 and Aug. 24-27.
We deeply appreciate the commitment to urban forestry demonstrated by our 2020 Tree City, Tree Campus and Tree Line USA participants. Thank you for your hard work!
The Climate Change Coalition of Door County is a volunteer organization that, for the past 9 years, has engaged in a variety of activities designed to increase understanding of global warming to inspire concern and action. This spring, the Coalition launched a new program called the Big Plant. It was successful beyond all expectations.
The Wisconsin Department of Natural Resources (DNR) Friend of Forestry Recognition program is an opportunity for the Forestry Division to recognize individuals who have worked with us to protect and sustainably manage Wisconsin’s forests.
The latest version of the USDA Forest Service’s Tree Owner’s Manual is now available online