USDA Forest Service:
1912 Insect control methods cartoon.
USDA Forest Service:
c.1915. Early gypsy moth control included cutting and burning infested wood lots in the Eastern US.
USDA Forest Service:
1920. Sun-curing ponderosa pine bark for western pine beetle control in ponderosa pine. San Joaquin experimental project. Sierra National Forest, California.
USDA Forest Service:
c.1920. Jake Garrison, Mono Chief, with a handful of live “peaggies,” pandora moth larvae.
USDA Forest Service:
1924. Preparing lodgepole pine infested with mountain pine beetle for the sun-curing (solar) treatment. Logs are limbed and topped so that direct rays of sun fall on them. Crater Lake National Park, Oregon.
USDA Forest Service:
1929. Lodgepole pine limbed for the sun-curing treatment. Limbs are piled to be burned when conditions are safe. Bark beetle control, Crater Lake National Park, Oregon.
USDA Forest Service:
1929. Solar-treating mountain pine beetle. Shows a typical area of beetle-treated group of 100 trees or more. Sand Creek, Forest Service control project, Oregon.
USDA Forest Service:
1930. Logging ponderosa pine to control Dendroctonus brevicomis. Klamath Falls, Oregon.
USDA Forest Service:
1930. Salvage logging ponderosa pine. Dendroctonus brevicomis control. Klamath Falls, Oregon.
USDA Forest Service:
1930. Insect cages used to collection slash insects in ponderosa pine slash relations study. Klamath Falls, Oregon.
USDA Forest Service:
1930. Shaded ponderosa pine top with thermometers in place. Slash temperature studies. Klamath Falls, Oregon.
USDA Forest Service:
1930. Exposed ponderosa pine top with thermometers in place. Slash temperature studies. Klamath Falls, Oregon.
USDA Forest Service:
1930. Ponderosa pine area before logging. Klamath Falls, Oregon.
USDA Forest Service:
1931. Ponderosa pine, slash relations, temperature, bark beetle study.
USDA Forest Service:
1934. Solar treated area to control Dendroctonus monticolae in lodgepole pine. Munson Plateau. Crater Lake National Park, Oregon.
USDA Forest Service:
1934. Suncured lodgepole pine infested with Dendroctonus monticolae. Treated area. Munson Plateau. Crater Lake National Park, Oregon.
USDA Forest Service:
1934. Suncuring bark to kill beetles. White pine in the mixture. Munson Plateau. Crater Lake National Park, Oregon.
USDA Forest Service:
1935. Special control experiment for Ips oregoni. Pringle Falls, Oregon.
USDA Forest Service:
1940. Loading logs from Experimental Logging Area with a cross-haul. Entomological selection.
USDA Forest Service:
1940. Loading logs from Experimental Logging Area with a cross-haul. Entomological selection.
USDA Forest Service:
1941. Ponderosa pine silvicultural selection; area 80% cut. Wolf Creek. Ochoco National Forest, Oregon.
USDA Forest Service:
1941. Ponderosa pine silvicultural selection; area 100% cut. Wolf Creek. Ochoco National Forest, Oregon.
USDA Forest Service:
1946. Sawfly (Neodiprion) defoliation; effect of spraying with .025% DDT. Partially defoliated and unharmed ponderosa pine reproduction. Allison Ranger Station. Ochoco National Forest, Oregon.
USDA Forest Service:
1947. Another type of treatment used in shady areas was to peel the bark from the tree with a spud thus exposing the bark beetle brood and killing it. Crater Lake National Park, Oregon.
USDA Forest Service:
1953. Pumping allyl alcohol from a drum to prayer tank. Huron-Manistee National Forest, Michigan.
USDA Forest Service:
1954. Screen cages on felled Douglas-fir. Cages contain Douglas-fir beetles treated with radioactive materials. Objective: to learn effects of the materials on the beetles. Oregon State Board of Forestry Research. Siuslaw Drainage. Oregon.
USDA Forest Service:
1957. Shipping box in which 10,000 Aphidoletes thompsoni: Mohn (Diptera: Cecidomyiidae), a predator of Chermes were received from Slovakia, Europe. Sellwood Lab. Portland, Oregon.
USDA Forest Service:
1957. Aphidoletes thompsoni Mohn. Male adult of balsam woolly adelgid predator introduced from Slovakia. Sellwood Lab. Portland, Oregon.
USDA Forest Service:
1957. Melrose box used for rearing Aphidoletes thompsoni, a predator of balsam woolly adelgid (Chermes piceae) that were received from Slovakia, Europe. Sellwood Lab. Portland, Oregon.
USDA Forest Service:
1957. Set-up for rearing Aphidoletes thompsoni, a predator of balsam woolly adelgid (Chermes piceae) were received from Slovakia, Europe, at the Sellwood Lab. Portland, Oregon.
