Larval densities and trends of insect species associated with spruce budworms in buds and shoots in Oregon and Washington.

V.M. Carolin

doi:10.2737/PNW-RP-273

Treesearch

Larval densities and trends of insect species associated with spruce budworms in buds and shoots in Oregon and Washington.

Informally Refereed

Authors:

V.M. Carolin

Year:

1980

Type:

Research Paper

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.2737/PNW-RP-273

Source:

Res. Pap. PNW-RP-273. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 24 p

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Download (PDF 1.06 MB): https://research.fs.usda.gov/download/treesearch/25121.pdf

Abstract

Sampling studies on western spruce budworm and Modoc budworm disclosed a substantial number of associated insect species at the time larvae were in opening buds. About 20 species occur with sufficient regularity to justify identification by field crews.

Keywords

Insect populations, reproductive behavior (insect), western spruce budworm, identification (insect), Choristoneura occidentalis, Modoc budworm, Choristoneura viridis

Citation

Carolin, V.M. 1980. Larval densities and trends of insect species associated with spruce budworms in buds and shoots in Oregon and Washington. Res. Pap. PNW-RP-273. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 24 p