Damage to Douglas-fir Cones by Choristoneura occidentalis

Jerald E. Dewey

Document Type

Article

Journal/Book Title/Conference

Journal of Economic Entomology

Publication Date

1970

Issue

6

Volume

63

Publisher

Oxford University Press

First Page

1804

Last Page

1806

Abstract

The budworm Choristoneura occidentalis Freeman was found to be a serious pest to Douglas-fir cones in Montana and Yellowstone National Park, Wyoming. A total of 41,250 cones was examined or placed in rearing containers during the summers of 1967 and 1968. Of the cones collected in 1967, 36% were infested with budworm larvae. One budworm often feeds on more than one cone during its development. Most of the seed in budworm-infested cones is destroyed.

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