USDA Forest Service:
1938. Tussock moth defoliation near Mammoth Lakes, California.
USDA Forest Service:
1946. Group of young Douglas-fir defoliated by Douglas-fir tussock moth. Troy, Oregon.
USDA Forest Service:
1946. Group of young Douglas-fir defoliated by Douglas-fir tussock moth. Troy, Oregon.
USDA Forest Service:
1946. Douglas-fir tussock moth cocoons on a Douglas-fir sapling. Troy, Oregon.
USDA Forest Service:
1946. Douglas-fir tussock moth cocoons on twigs of young Douglas-fir. Troy, Oregon.
USDA Forest Service:
c.1947. Tussock moth.
USDA Forest Service:
1947. Map of areas sprayed with DDT north and east of Moscow Idaho. Douglas-fir tussock moth control project.
USDA Forest Service:
1947. Douglas-fir defoliated by Douglas-fir tussock moth. Moscow Mountain, Idaho.
USDA Forest Service:
1947. Front: Teeter; P.C. Johnson. Back: R.L. Furniss; S.J. Yuill; D. Isler; D.E. Parker; J.C. Evenden. Tussock moth control project. Idaho.
USDA Forest Service:
1947. Johnson Flying Service personnel beside DC-3. Moscow-Pullman Airport, Idaho.
USDA Forest Service:
1947. Johnson Flying Service C-47. Northern Idaha Douglas-fir tussock moth control project.
USDA Forest Service:
1947. L-t-R: Stanton Ready, Ed Ring, Thomas Crossley, and Henry Jones examining spray boom on a Ford Trimotor. Douglas-fir tussock moth control project. Northern Idaho.
USDA Forest Service:
1947. Constructing a landing field in a pasture two miles north of Laird Park, Idaho. Douglas-fir tussock moth control project.
USDA Forest Service:
1947. Aerial view of landing strip north of Laird Park along Highway 6 in northern Idaho. Douglas-fir tussock moth control project.
USDA Forest Service:
1947. Central Aircraft's Stearmans lined up for loading with spray. Douglas-fir tussock moth control project. Northern Idaho.
USDA Forest Service:
1947. Travelair sprayboom. Douglas-fir tussock moth control project in northern Idaho.
USDA Forest Service:
1947. Johnson Flying Service Ford Trimotor "Tin Goose". Douglas-fir tussock moth control project in northern Idaho.
USDA Forest Service:
1947. DC-3 spraying DDT. Douglas-fir tussock moth control project in northern Idaho.
USDA Forest Service:
1947. Ford Trimotor spraying DDT. Douglas-fir tussock moth control project in northern Idaho.
USDA Forest Service:
1947. Zimmerly's Travelair 600-B wrecked near Harvard, Iadho. Douglas-fir tussock moth control project.
USDA Forest Service:
1947. Jim Larkin's Stearman wreckage. Douglas-fir tussock moth control project in northern Idaho.
USDA Forest Service:
1947. Ground-looped Travelair at airstrip north of Laird Park, Idaho. Douglas-fir tussock moth control project.
USDA Forest Service:
1947. Walter J. Buckhorn examines screen used to intercept air-borne Douglas-fir tussock moth larvae.
USDA Forest Service:
1947. Douglas-fir terminal showing Douglas-fir tussock moth larvae and webbing.
USDA Forest Service:
1947. Douglas-fir terminal showing Douglas-fir tussock moth larvae and webbing.
USDA Forest Service:
1947. Douglas-fir terminal showing Douglas-fir tussock moth larvae and webbing.
USDA Forest Service:
1947. Douglas-fir tussock moth cocoons.
USDA Forest Service:
1947. Douglas-fir tussock moth cocoons on twig.
USDA Forest Service:
1947. Douglas-fir tussock moth cocoon on twig.
USDA Forest Service:
1947. Mature Douglas-fir tussock moth larva.
