Specialists
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Beech Bark Disease
Beech bark disease is a major threat to American beech (Fagus grandifolia) in eastern North America. The disease is the result of an interaction between an insect (a scale) and a fungus (Neonectria) and it only happens when both are present.
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Bark Beetles and Associated Issues
Bark and ambrosia beetles (family Curculionidae, subfamily Scolytinae) are a diverse group of wood-boring beetles found in every forest type across the world. The United States and Canada are home to approximately 600 species of bark and ambrosia…
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Asian Longhorned Beetle
Learn here how to identify Asian longhorned beetle, where it is and how to help keep it from moving to new places. This pest is a serious threat to Wisconsin forests because it can attack many different tree species, even when the trees are…
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Heterobasidion Root Disease (HRD)
The Wisconsin DNR maintains the locations of all stands confirmed with HRD. If you suspect HRD in your stand, please contact forest health staff for confirmation and consultation.Heterobasidion root disease (HRD), formerly known as annosum root rot…
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Hemlock Woolly Adelgid
Hemlock woolly adelgid (Adelges tsugae) is a tree-killing insect that was accidentally introduced to eastern North America. It can become a threat to Wisconsin’s eastern hemlocks if it arrives here. Learn where this pest is now, what it looks like…
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Urban Tree Canopy (UTC) Analysis
Urban tree canopy is the entire area covered by trees’ crowns within a geographic space, often expressed as a proportion of an area’s total land. The aim of a UTC assessment is to help analysts and decision makers better understand their urban…
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Urban Forest Inventory and Analysis (UFIA)
The Urban Forest Inventory and Analysis (UFIA) program in Wisconsin is a partnership between the USDA Forest Service and the Wisconsin DNR that has established 1,300 permanent plots across the state’s urban areas. Tree and land cover data are…
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Urban Forest Data, Analysis and Monitoring
The DNR maintains a variety of data collection programs to assess the composition, health and extent of Wisconsin’s urban forests. Major monitoring efforts include compiling public tree inventories, establishing long-term urban forest plots, and…