Key to adult bark beetles commonly associated with white spruce stands in interior Alaska von Beckwith, R. C

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Stochastic model of insect phenology: estimation and testing von Dennis, B, Kemp, W.P, Beckwith, R.C

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Diet and Foraging Behavior of Vaux's Swifts in Northeastern Oregon von Bull, Evelyn L., Beckwith, Roy C.

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Comparison of Two Isolates of Bacillus thuringiensis in a Field Test on Western Spruce Bud worm (Lepidoptera: Tortricidae)1 von Stelzer, Milton J., Beckwith, Roy C.

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Persistence of Bacillus thuringiensis in Two Formulations Applied by Helicopter Against the Western Spruce Budworm (Lepidoptera: Tortricidae) in North Central Oregon1 von Beckwith, Roy C., Stelzer, Milton J.

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A survey of the Lepidoptera fauna from the Blue Mountains of eastern Oregon von Grimble, David G, Beckwith, Roy C., Hammond, Paul C

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Thinning and Nitrogen Fertilization in a Grand Fir Stand Infested with Western Spruce Budworm. Part I: Insect Response von Mason, Richard R., Wickman, Boyd E., Beckwith, Roy C., Paul, H. Gene

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Effects of constant laboratory temperatures on the Douglas-fir tussock moth (Lepidoptera: Lymantriidae) [Orgyia pseudotsugata] von Beckwith, Roy C.

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Stochastic phenology model for the western spruce budworm (Lepidoptera: Tortricidae) von Kemp, W.P, Dennis, B, Beckwith, R.C

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Arthropod Diet of Pileated Woodpeckers in Northeastern Oregon von Bull, Evelyn L., Beckwith, Roy C., Holthausen, Richard S.

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Instar development of the Douglas-fir tussock moth in relation to field temperatures von Beckwith, Roy C

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Effects of Bacillus thuringiensis on Parasites of Western Spruce Budworm (Lepidoptera: Tortricidae)1 von Niwa, Christine G., Stelzer, Milton J., Beckwith, Roy C.

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Spring Larval Dispersal of the Western Spruce Budworm (Lepidoptera: Tortricidae) in North-Central Washington 1 von Beckwith, Roy C., Burnell, Donald G.

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Disappearing Pupae: A Source of Possible Error in Estimating Population Density1 von Campbell, Robert W., Torgersen, Torolf R., Beckwith, Roy C.

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Patterns of occurrence of the western spruce budworm (Lepidoptera: Tortricidae): larvae, pupae and pupal exuviae, and egg masses [Choristoneura occidentalis] von Campbell, R.W, Srivastava, N, Torgersen, T.R, Beckwith, R.C

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Role of parasites in the population dynamics of the western spruce budworm (Lepidoptera: Tortricidae) in the northwest [Choristoneura occidentalis] von Torgersen, T.R, Campbell, R.W, Srivastava, N, Beckwith, R.C

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Numerical behavior of some western spruce budworm (Lepidoptera:Tortricidae) populations in Washington and Idaho [Choristoneura occidentalis] von CAMPBELL, R. W, BECKWITH, R. C, TORGERSEN, T. R

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Isoenzyme Identification of Picea glauca, P. sitchensis, and P. lutzii Populations von Copes, Donald L., Beckwith, Roy C.

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A Penetrometer to Quantify Leaf Toughness in Studies of Defoliators von Beckwith, Roy C., Helmers, Austin E.

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Scat Analysis of the Arthropod Component of Pileated Woodpecker Diet von Beckwith, Roy C., Bull, Evelyn L.

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