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Roy C. Beckwith

United States Department of Agriculture

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Publication

Featured researches published by Roy C. Beckwith.

Environmental Entomology | 1986

Stochastic Model of Insect Phenology: Estimation and Testing

Brian Dennis; William P. Kemp; Roy C. Beckwith

Environmental Entomology | 1977

Fecundity Reduction During Collapse of a Douglas-fir Tussock Moth Outbreak in Northeast Oregon

Richard R. Mason; Roy C. Beckwith; H. Gene Paul

Environmental Entomology | 1986

Stochastic phenology model for the western spruce budworm (Lepidoptera: Tortricidae)

William P. Kemp; Brian Dennis; Roy C. Beckwith

Canadian Entomologist | 1972

SCOLYTID FLIGHT IN WHITE SPRUCE STANDS IN ALASKA

Roy C. Beckwith

Canadian Entomologist | 1970

Influence of host on larval survival and adult fecundity of Choristoneura conflictana (Lepidoptera: Tortricidae).

Roy C. Beckwith

Journal of Economic Entomology | 1987

Persistence of Bacillus thuringiensis in Two Formulations Applied by Helicopter Against the Western Spruce Budworm (Lepidoptera: Tortricidae) in North Central Oregon

Roy C. Beckwith; Milton J. Stelzer

Journal of Economic Entomology | 1987

Effects of Bacillus thuringiensis on Parasites of Western Spruce Budworm (Lepidoptera: Tortricidae)

Christine G. Niwa; Milton J. Stelzer; Roy C. Beckwith

Environmental Entomology | 1984

Role of Parasites in the Population Dynamics of the Western Spruce Budworm (Lepidoptera: Tortricidae) in the Northwest

Torolf R. Torgersen; Robert W. Campbell; Nilima Srivastava; Roy C. Beckwith

Canadian Entomologist | 1974

Parasitoids associated with the large Aspen tortrix, Choristoneura conflictana (Lepidoptera : Tortricidae), in interior Alaska

Torolf R. Torgersen; Roy C. Beckwith

Environmental Entomology | 1983

Numerical Behavior of Some Western Spruce Budworm (Lepidoptera: Tortricidae) Populations in Washington and Idaho

Robert W. Campbell; Roy C. Beckwith; Torolf R. Torgersen

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Torolf R. Torgersen

United States Department of Agriculture

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Robert W. Campbell

United States Department of Agriculture

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Brian Dennis

University of Idaho

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Milton J. Stelzer

United States Department of Agriculture

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Nilima Srivastava

United States Department of Agriculture

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Richard R. Mason

United States Department of Agriculture

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William P. Kemp

Agricultural Research Service

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Austin E. Helmers

United States Department of Agriculture

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Christine G. Niwa

United States Forest Service

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H. G. Paul

United States Department of Agriculture

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