Washington Dept. of Natural Resources 2003 FH Highlights

Washington Department of Natural Resources

posted by:
USDA Forest Service
Pacific Northwest Region
Forest Health Protection

Washington Forest Health Issues in 2003

Washington Forests General Forest Conditions	Insects Fir Engraver Pine Bark Beetles Citrus Long-horned Beetle Western Spruce Budworm Douglas-fir Beetle Spruce Beetle Douglas-fir Tussock Moth Western Hemlock Looper Gypsy Moth Other Defoliators
Aerial Survey Overview Survey Results
Animal and Abiotic Drought Fire Bear Damage
Diseases Sudden Oak Death Swiss Needle Cast White Pine Blister Rust

Douglas-fir Tussock Moth (DFTM)

Douglas-fir tussock moth is a native defoliator of Douglas-fir and true fir trees. It typically exits at low numbers, but periodically erupts into huge population levels which can completely defoliate trees in a single season producing widespread mortality and top kill.

Defoliation by DFTM on Tekoe Mtn south of Spokane

Area of defoliation from DFTM on Tekoe Mtn. south of Spokane on the Idaho border.

DNR monitors about 190 pheromone trap sites in Washington.

These trapping results are integrated with those of other landowners to provide early warning of rising DFTM populations. Overall, 2004 trap catches were very low indicating stable, low populations.

DFTM outbreaks throughout the northwest have mostly subsided from 2000-2002.

Additional Information

WADNR Forest Health Home

Washington Department of Natural Resources

PNW Region Forest Health Protection