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Torolf R. Torgersen

United States Department of Agriculture

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Publication

Featured researches published by Torolf R. Torgersen.

Environmental Entomology | 1983

Natural Regulation of a Douglas-Fir Tussock Moth (Lepidoptera: Lymantriidae) Population in the Sierra Nevada

Richard R. Mason; Torolf R. Torgersen; Boyd E. Wickman; H. Gene Paul

Environmental Entomology | 1982

Some Effects of Avian Predators on the Western Spruce Budworm 1 in North Central Washington

Torolf R. Torgersen; Robert W. Campbell

Canadian Entomologist | 1983

MORTALITY OF LARVAE IN STOCKED COHORTS OF THE DOUGLAS-FIR TUSSOCK MOTH, ORGYIA PSEUDOTSUGATA (LEPIDOPTERA: LYMANTRIIDAE)

Richard R. Mason; Torolf R. Torgersen

Environmental Entomology | 1982

Some Effects of Predaceous Ants on Western Spruce Budworm Pupae in North Central Washington

Robert W. Campbell; Torolf R. Torgersen

Environmental Entomology | 1987

Dynamics of a nonoutbreak population of the Douglas-fir Tussock moth (Lepidoptera: Lymantriidae) in southern Oregon

Richard R. Mason; Torolf R. Torgersen

Environmental Entomology | 1983

Predation on Pupae of Douglas-fir Tussock Moth, Orgyia pseudotsugata (McDunnough) (Lepidoptera: Lymantriidae)

Torolf R. Torgersen; Richard R. Mason; H. Gene Paul

Environmental Entomology | 1984

Avian Predators of Douglas-fir Tussock Moth, Orgyia pseudotsugata (McDunnough), (Lepidoptera: Lymantriidae) in Southwestern Oregon

Torolf R. Torgersen; Jack Ward Thomas; Richard R. Mason; Dennis Van Horn

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 | 1987

Predation on Egg Masses of the Douglas-fir Tussock Moth (Lepidoptera: Lymantriidae)

Torolf R. Torgersen; Richard R. Mason

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Robert W. Campbell

United States Department of Agriculture

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Richard R. Mason

United States Department of Agriculture

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Roy C. Beckwith

United States Department of Agriculture

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Nilima Srivastava

United States Department of Agriculture

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Boyd E. Wickman

United States Department of Agriculture

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H. Gene Paul

United States Department of Agriculture

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Kevin P. Hosman

University of Idaho

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Malcolm M. Furniss

University of Idaho

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