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Forest & Grassland Health
Common Forest Insects & Diseases in Alaska
Nested within the State & Private Forestry branch of the U.S. Forest Service, Forest Health Protection monitors across all lands to meet the needs of federal, state, tribal, and private stakeholders. Select forest diseases, insects, noninfectious disorders, & invasive plant topics from the menu below for detailed information. Also see:
- Forest Health Conditions Reports, interactive maps & ground survey data dashboard (2020 Conditions Report)
- Outreach videos on western blackheaded budworm & hemlock sawfly
- Invasive plant pocket guide (revised 2020) & learn about invasive plants in Alaska
- Do you want to report a forest health observation? See our webpage with tips on what info to include with observations & learn about the Alaska Forest Health Observations project on iNaturalist. You can also contact forest health experts on our team.
FOREST DISEASES
Foliage Diseases
- Cedar Leaf Blight
- Dothistroma Needle Blight
- Hardwood Leaf Rusts
- Hemlock-Blueberry Rust
- Spruce Needle Casts/Blights
- Spruce Needle Rust
- Viburnum Leaf & Stem Rust
Shoot, Twig & Bud Blights
Stem Diseases
- Alder Canker
- Aspen Running Canker
- Aspen Target Canker
- Diplodia Gall
- False Tinder Conk/Punk Ash
- Hemlock Canker
- Hemlock Dwarf Mistletoe
- Spruce Broom Rust
- Stem Decays of Conifers
- Stem Decays of Hardwoods
- Western Gall Rust
Root Diseases
- Annosus/Heterobasidion Root & Butt Rot
- Armillaria Root Disease
- Pholiota/Yellow-Cap Fungus
- Tomentosus Root Rot
Invasive Pathogens
NONINFECTIOUS DISORDERS
Forest Decline
Abiotic & Animal Damage
FOREST INSECTS
Bark Beetles and Woodborers
- Ambrosia Beetle
- N. Spruce Engraver & Other Ips
- Spruce Beetle
- Western Balsam Bark Beetle
Defoliating Insects
Conifer Defoliators
- Balsam Woolly Adelgid
- Hemlock Sawfly
- Larch Sawfly
- Spruce Aphid
- Spruce Budworm
- Spruce & Larch Budmoth
- Western Blackheaded Budworm
Hardwood Defoliators
- Alder Defoliators
- Aspen Leafminer
- Birch Aphid
- Birch Leafminers
- Birch Leafroller
- Fireweed Hawk Moth
- Generalist Hardwood Defoliators
- Large Aspen Tortrix
- Leaf Beetles
- Rusty Tussock Moth
- Western Tent Caterpillar
- Willow Leafblotch Miner
Urban Tree & Plant Pests
INVASIVE PLANTS
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