Forest Health

Forest Health

Promoting healthy Wisconsin forests

Whether you're a rural landowner or a city dweller, you can help promote healthy Wisconsin forests. Learn the distributions, life cycles and management options for the pests, plants and diseases that impact them.

Newsletters, Fact Sheets and Identification Assistance

Resource listings for tree and insect identification, sick tree diagnostics and other information.
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Oak Wilt

Learn how to prevent, detect and manage this disease of oak trees.
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Invasive Species

Learn more about invasive plants and insects in Wisconsin and how to slow their spread.
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Heterobasidion root disease (HRD)

Learn how to prevent, detect and manage this disease common to pine and spruce.
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Emerald Ash Borer

Learn more about this invasive insect, including identification, impact and management strategies.
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Spongy Moth

Learn more about this invasive insect, including management, quarantine restrictions and regulations.
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Jumping Worms

Learn how to identify, prevent and manage this invasive threat to forest and urban landscapes.
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Firewood

Learn the firewood rules and protect Wisconsin's trees from invading pests and diseases.
Firewood

Asian longhorned beetle

Learn how to identify, prevent and manage this invasive threat to maples and other hardwoods.
Asian longhorned beetle

Hemlock woolly adelgid

Learn about how this invasive pest impacts eastern hemlocks, and how to prevent its spread.
Hemlock woolly adelgid

Bark beetles and associated issues

Get more information about the bark and ambrosia beetles found in Wisconsin.
Bark beetles and associated issues

Beech Bark Disease

Learn the signs and management strategies for this major threat to the American beech.
Beech Bark Disease

Forest tent caterpillar

Learn more about this leaf-eating caterpillar native to Wisconsin.
Forest tent caterpillar