Mortality of spruce and fir in Maine in 1976-78 due to the spruce budworm outbreak

Donald W. Seegrist; Stanford L. Arner

doi:10.2737/NE-RP-491

Treesearch

Mortality of spruce and fir in Maine in 1976-78 due to the spruce budworm outbreak

Informally Refereed

Authors:

Donald W. Seegrist, Stanford L. Arner

Year:

1982

Type:

Research Paper

Station:

Northern Research Station

DOI:

https://doi.org/10.2737/NE-RP-491

Source:

Res. Pap. NE-491. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 3p.

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Abstract

The spruce budworm population in Maine's spruce-fir forests has been at epidemic levels since the early 1970's. Spruce-fir mortality in 1976-78 is compared with predictions of what mortality would have been had the natural mortality rates remained at the levels experienced before the budworm outbreak. It appears that mortality of spruce and fir has increased 2 1/2-fold since the 1960's, that is, 60 percent of the mortality can be attributed to the budworm outbreak.

Keywords

Choristoneura fumiferana

Citation

Seegrist, Donald W.; Arner, Stanford L. 1982. Mortality of spruce and fir in Maine in 1976-78 due to the spruce budworm outbreak. Res. Pap. NE-491. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 3p.