Find Forest Health Help

For sick forest trees, contact a DNR forest health specialist or forester. For sick ornamental or urban trees, contact a certified arborist [exit DNR] or your county UW-Extension Office [exit DNR].

Forest health news

• Read forest health news

Sick tree diagnostics

• What's Wrong With My Deciduous Tree? [exit DNR] – University of Minnesota
• What's Wrong With My Conifer? [exit DNR] – UM.
• Plant Disease Diagnostics Clinic [exit DNR] – University of Wisconsin-Madison

Insect identification

• What Insect is This? [exit DNR] - U. of Minnesota
• UW-Madison Insect Identification [exit DNR]
• BugGuide.Net [exit DNR]

Tree identification

• Tree identification

Publications

• All forest health publications
• Guidelines
  • Emerald Ash Borer [PDF]
  • Heterobasidion Root Disease [PDF]
  • Oak Harvesting Guidelines [PDF]
• Factsheets
  • Armillaria [PDF]
  • Beech Bark Disease [PDF]
  • Common Fungal Diseases of Spruce [PDF]
  • Conifer Bark Beetle [PDF]
  • Diplodia [PDF]
  • Emerald Ash Borer [PDF]
  • Environmental Causes of Tree Damage [PDF]
  • Hemlock Woolly Adelgid [PDF]
  • Heterobasidion Root Disease [PDF]
  • Hickory Dieback and Mortality [PDF]
  • Oak wilt [PDF]
  • Peach Bark Beetle and Cherry Scallop Shell Moth [PDF]
• Wisconsin DNR Forest Health 2021 Annual Report [PDF]
  • To access archived regional and annual reports dating back to 1951, contact your regional forest health specialist.