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Survival of early instars of the western spruce budworm (Choristoneura occidentalis Freeman)

Creator:: Egan, Thomas H.
Resource Type:: Dissertation
Full Text:: for collecting hibernating western spruce budworm larvae 11 Abstract 12 Introduction 14 Methods 16

Foliage-consuming insects in mixed Douglas-fir and western hemlock forests annual biomass budget for spruce budworm

Creator:: Strand, Mary Ann Sall, U.S. International Biological Program. Coniferous Forest Biome, and University of Washington
Resource Type:: Technical Report
Full Text:: Douglas-fir and Western Hemlock Forests Annual Biomass Budget for Spruce Budworm Mary Ann Strand Oregon

Western spruce budworm in the Northern Region : 1985 situation analysis

Creator:: United States. Forest Service. Northern Region. Cooperative Forestry & Pest Management, United States. Forest Service. Timber Management, and United States. Forest Service. Planning, Programming, and Budgeting
Resource Type:: Technical Report
Full Text:: • • I I • WESTERN SPRUCE BUDWORM IN THE NORTHERN REGION

Observations on the impact of western spruce budworm on the Valley Creek Drainage, Flathead Indian Reservation, Montana

Creator:: Bousfield, Wayne E. and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: The western spruce budworm, Choristoneura occidentalis (Free.), has caused a measurable impact on a portion of the Flathead Indian Reservation during a 5-year infestation period. This survey showed that most of the grand fir and alpine fir, and 13.8 percent of the Douglas fir has been top killed in the...
Resource Type:: Technical Report
Full Text:: REFERENCES CITED Fellin, David G. and Wyman C. Schmidt, 1967. Spruce budworm larvae sever stems of western

Ant predators of the Western spruce budworm (Choristoneura occidentalis Freeman) : species composition and patterns of occurrence in eastern Oregon and western Montana

Creator:: Youngs, Lorna C.
Abstract:: The identity and distribution of ant species preying on the western spruce budworm (Choristoneura occidentalis Freeman) was investigated in eastern Oregon and western Montana. A sticky trap was developed to index ant foraging activity in the canopy by intercepting ants falling from the tree as they traveled between canopy and...
Resource Type:: Dissertation
Full Text:: Ant Predators of the Western Spruce Budworm (Choristoneura

Establishment report of the western spruce budworm silvicultural demonstration project on the Gallatin and Lolo National Forests, Montana

Creator:: Bousfield, Wayne E., Wulf, N. William, Stipe, Lawrence E., and United States. Forest Service. Northern Region. Cooperative Forestry & Pest Management
Resource Type:: Technical Report
Full Text:: - cent class. • • Insect Conditions Western spruce budworm larvae were sampled on four tree sizes

Western spruce budworm egg masses for predicting defoliation potential in the northern region : progress report

Creator:: Tunnock, Scott and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: An attempt was made to predict western spruce budworm defoliation using egg counts from plots in the Douglas-fir type east of the Continental Divide in Montana, the Douglas-fir type west of the Continental Divide in Montana, and the mixed grand fir Douglas-fir type of northern Idaho. The parameters used in...
Resource Type:: Technical Report
Full Text:: -27 5200 December 1974 • "S'ir A/04 4 WESTERN SPRUCE BUDWORM EGG MASSES FOR PREDICTING DEFOLIATION

Pilot experiment of forest fertilization during an outbreak of the western spruce budworm in Northeastern Oregon

Creator:: Mason, Richard R., Wickman, B. E., Paul, H. G., and Torgersen, T. R.
Abstract:: Mixed-conifer stands of grand fir (Abies grandis (Dougl. ex D. Don) Lindl., Douglas-fir (Pseudotsuga menziesii var. glauca (Beissn.) Franco), and ponderosa pine (Pinus ponderosa Dougl. ex Laws.) were fertilized with nitrogen and combination treatments of nitrogen, phosphorus, potassium, and sulfur to test their effects on trees and associated insects during...
Resource Type:: Technical Report

Pilot project of Bacillus thuringiensis against western spruce budworm in central Montana, 1981

Creator:: Stipe, Lawrence E., Niwa, Christine G., Eder, Robert G., Gibson, Kenneth E., and Meyer, Hubert E.
Abstract:: Cooperative Forestry and Pest Management conducted a pilot control project in central Montana to determine the effectiveness of two commercial formulations of BaaiUus th,uringiensis Berliner applied at 8 billiori international units (BIU) per acre (19.8 BIU per hectare) when used under operational conditions against the western spruce budworm, Choristoneu:roa ocaidentalis...
Resource Type:: Technical Report
Full Text:: ) against mid-instar western spruce budworm larvae. Each in- secticide treatment was replicated three times

Pilot project of carbaryl and trichlorfon against the western spruce budworm : Beaverhead National Forest, Montana

Creator:: Flavell, Thomas H., Tunnock, S., Barry, J. W., Ekblad, R. B., and Ciesla, W. M.
Resource Type:: Technical Report
Full Text:: CARBARYL AND TRICHLORFON AGAINST THE WESTERN SPRUCE BUDWORM BEAVERHEAD NATIONAL FOREST, MONTANA, 1975 by

ScholarsArchive@OSU

Survival of early instars of the western spruce budworm (Choristoneura occidentalis Freeman)

Foliage-consuming insects in mixed Douglas-fir and western hemlock forests annual biomass budget for spruce budworm

Western spruce budworm in the Northern Region : 1985 situation analysis

Observations on the impact of western spruce budworm on the Valley Creek Drainage, Flathead Indian Reservation, Montana

Ant predators of the Western spruce budworm (Choristoneura occidentalis Freeman) : species composition and patterns of occurrence in eastern Oregon and western Montana

Establishment report of the western spruce budworm silvicultural demonstration project on the Gallatin and Lolo National Forests, Montana

Western spruce budworm egg masses for predicting defoliation potential in the northern region : progress report

Pilot experiment of forest fertilization during an outbreak of the western spruce budworm in Northeastern Oregon

Pilot project of Bacillus thuringiensis against western spruce budworm in central Montana, 1981

Pilot project of carbaryl and trichlorfon against the western spruce budworm : Beaverhead National Forest, Montana

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