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Mortality and top killing of spruce-fir caused by repeated budworm defoliation

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By: Schmiege, Donald C. - Lake States Forest Experiment Station (Saint Paul, Minn.)

Publication info: St. Paul, MN, Lake States Forest Experiment Station, 1961

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

Subjects: Abies Choristoneura fumiferana Diseases and pests Forest insects Minnesota Mortality Picea Spruce Spruce budworm
Spruce budworm defoliation causes continued top killing and tree mortality in northeastern Minnesota

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By: Batzer, Harold O. - Bean, James L. - Lake States Forest Experiment Station (Saint Paul, Minn.)

Publication info: [St. Paul, MN], Lake States Forest Experiment Station, [1962]

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

Subjects: Abies balsamea Choristoneura fumiferana Insect pests Minnesota Mississippi Mortality Picea Trees