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By: Batzer, Harold O. - Bean, James L. - Lake States Forest Experiment Station (Saint Paul, Minn.)Edition:Publication info: [St. Paul, MN], Lake States Forest Experiment Station, [1962]Volume: no.621Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects: Abies balsamea Choristoneura fumiferana Insect pests Minnesota Mississippi Mortality Picea TreesBHL Collections:
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By: Schmiege, Donald C. - Lake States Forest Experiment Station (Saint Paul, Minn.)Edition:Publication info: St. Paul, MN, Lake States Forest Experiment Station, 1961Volume: no.597Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects: Abies Choristoneura fumiferana Diseases and pests Forest insects Minnesota Mortality Picea Spruce Spruce budwormBHL Collections: