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Peroral bioassay of nucleopolyhedrosis viruses in larvae of the western spruce budworm

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By: Martignoni, Mauro E., - Iwai, Paul J. - Pacific Northwest Forest and Range Experiment Station (Portland, Or.) - Canada/United States Spruce Budworms Program.

Publication info: Portland, Or, Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service, 1981

Holding Institution: U.S. Department of Agriculture, National Agricultural Library
Some effects of predaceous birds and ants on the western spruce budworm on conifer seedlings

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By: Campbell, Robert W. - Pacific Northwest Forest and Range Experiment Station (Portland, Or.) - Canada/United States Spruce Budworms Program.

Publication info: [Portland, Or.], U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1984

Holding Institution: U.S. Department of Agriculture, National Agricultural Library