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Filtering by: Creator Davis, Adam S. Remove constraint Creator: Davis, Adam S. Creator United States. Forest Service. Northern Region. State & Private Forestry Remove constraint Creator: United States. Forest Service. Northern Region. State & Private Forestry File Format application/pdf Remove constraint File Format: application/pdf

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Potential for defoliation by western spruce budworm in Douglas-fir stands in Montana, 1976

Creator:

Tunnock, Scott, Flavell, Thomas H., Meyer, Hubert E., and United States. Forest Service. Northern Region. State & Private Forestry

Abstract:

Aerial surveys of six Montana National Forests in 1975 found a 22.1% increase in the area of visible defoliation caused by the western spruce budworm. It is estimated that 2,278,804 acres of Douglas-fir forests are now suffering at least 25% defoliation. This is an increase of 503,706 acres over the...

Resource Type:

Technical Report

Full Text:

SATE (O Cu .ro) R :1 r.... RS -TY N4t)S n630 1/ Entomologist, Forest Environmental Protection
Evaluation of 35mm vertical aerial photography for estimating tree mortality

Creator:

Williams, Ralph E. and United States. Forest Service. Northern Region. State & Private Forestry

Abstract:

Evaluation of four 35 mm film:lens combinations for estimating conifer mortality showed that large-scale true color images obtained with Kodak High Speed Ektachrome and color infrared images obtained with Kodak Ektachrome Infrared, both exposed through a 135 mm lens were best. Higher correlation coefficients were found for the true color:135...

Resource Type:

Technical Report

Full Text:

), standard deviation (S), and standard error (Sx). Expansion of this data was accomplished by multiplying
Evaluation of sulfur dioxide injury to vegetation on federal lands near the Anaconda copper smelter at Anaconda, Montana

Creator:

Carlson, Clinton E. and United States. Forest Service. Northern Region. State & Private Forestry

Resource Type:

Technical Report

Full Text:

similar stands in nonpolluted areas. Since the early 1900's several SO2 abatement devices have been
Pilot survey to measure annual mortality caused by the mountain pine beetle in lodgepole pine on the Beaverhead, Gallatin and Flathead National Forests in 1978

Creator:

Bennett, D. D. and United States. Forest Service. Northern Region. State & Private Forestry

Resource Type:

Technical Report

Full Text:

separate according to subplot designation. S IP • IIP • S • 3 • • • • To determine the best
Western spruce budworm in the Northern Region in 1977 and predictions for defoliation in 1978

Creator:

Flavell, Thomas H. and United States. Forest Service. Northern Region. State & Private Forestry

Resource Type:

Technical Report

Full Text:

U.S. Forest Service Methods Application Group at Davis, California. Data from the 1976 egg mass
Natural mortality in a Douglas-fir tussock moth infestation in Idaho, 1974

Creator:

Tunnock, Scott, McGregor, Mark D., Lood, Rudolph C., and United States. Forest Service. Northern Region. State & Private Forestry

Abstract:

Mortality from various causes was recorded in a Douglas-fir tussock moth, Orgyia pseudotsugata McD., outbreak southeast of Coeur d'Alene, Idaho, in 1974. Observations began June 27 when about 50 percent of the larvae were second instars and continued until pupation. Within a 35-day period, there was a 93 percent average...

Resource Type:

Technical Report

Full Text:

recorded s-fir tussock moth, Orgyia pseudotsugata McD., outbreak southeast of Coeur d'Alene, Idaho, in
Potential for defoliation by western spruce budworm in northern Idaho and Montana, 1977

Creator:

Tunnock, Scott and United States. Forest Service. Northern Region. State & Private Forestry

Abstract:

Epidemic populations of the western spruce budworm persist in the Northern Region. Aerial surveys made in August 1976 showed a decline in the acreage of aerially visible defoliation. In northern Idaho, the defoliated area dropped from 831,487 acres in 1975 to 655,711 acres in 1976, down 21 percent. Surveys in...

Resource Type:

Technical Report

Full Text:

's, infestations have fluctuated in size, but persisted in northern Idaho and western and eastern
A pilot project evaluating trichlorfon and acephate for managing the western spruce budworm, Choristoneura occidentalis Freeman, Helena National Forest, Montana, 1976

Creator:

Flavell, Thomas H., Tunnock, Scott, Meyer, Hubert E., and United States. Forest Service. Northern Region. State & Private Forestry

Abstract:

A pilot project to evaluate trichlorfon and acephate for suppressing western spruce budworm populations was conducted on the Helena National Forest, Montana. Both insecticides were applied at 1 pound active ingredient per acre. Application was made with a Bell 205A helicopter using eight Beecomist Model 350 spray heads. Treatments and...

Resource Type:

Technical Report

Full Text:

aerial application of Orthene 75-S and Dylox 4 for control of western spruce budworm 34 B. Maps of
A cooperative evaluation of potential air pollution injury and damage to coniferous habitats on national forest lands near Colstrip, Montana : I. Interim report of activities from June 1, 1975 -- May 30, 1976

Creator:

Gordon, Clarence C., Carlson, Clinton E., Tourangeau, Phillip, and United States. Forest Service. Northern Region. State & Private Forestry

Abstract:

Baseline data for the first year of a two-year study to assess the current status of ponderosa pine stands in southeastern Montana relative to coal-fired electric power development are presented. Sixteen permanent plots in pine stands were established in eastern Montana, South Dakota, and Wyoming. Several characteristics believed to be...

Resource Type:

Technical Report

Full Text:

appreciate the efforts of Grant Davis, SEAM, for releasing the necessary monies. We are immeasurably
A three year evaluation of Douglas-fir cone and seed insects in Montana and Yellowstone National Park

Creator:

Dewey, Jerald E. and United States. Forest Service. Northern Region. State & Private Forestry

Abstract:

A 3-year evaluation of Douglas-fir cones in Montana and Yellowstone National Park, Wyoming, showed the western spruce budworm, Choristoneura occidentalis Freeman, and midges were the most common and injurious insects found each year. Injury was so severe at some plots that no sound seeds could be found.

Resource Type:

Technical Report

Full Text:

Evaluation of no.72-1 ;LAS-FIR CONE AND SEED INSECTS itana and Yellowstone National Park • I U. S

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Creator

United States. Forest Service. Northern Region. State & Private Forestry[remove]16
Carlson, Clinton E.4
Tunnock, Scott4
Flavell, Thomas H.3
Dooling, Oscar J.2
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Date

Date range begin – Date range end

Current results range from 1972 to 1981

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1980-19892
1970-197914

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application/pdf[remove]16

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English [eng]16

Resource Type

Technical Report16

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Copyright Not Evaluated16

Subject

Report (United States. Forest Service. Northern Region. Insect and Disease Management)7
Western spruce budworm -- Montana4
Conifers -- Diseases and pests -- Idaho3
Conifers -- Diseases and pests -- Montana2
Douglas fir -- Diseases and pests -- Montana2
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