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acre annual aphid biological Bituminous Region campsites cankers chemical chestnut chestnut blight Conf cooperative costs cutting damage decay and discoloration decisions defoliation developed dieback disease eastern Maryland eastern white pine effective ester Experimental Forest factors Fernow fire forest insects forest management Forest Products Forest Res forestry schools fungi gypsy moth height growth Hubbard Brook illus improvement inches increase Laboratory loblolly loblolly pine logging marketing methods mist-blower Northeastern Forest northern hardwoods oak wilt paper birch Pennsylvania percent pest planning plantations planting plots practices Proc recreation areas red maple regeneration research program residues sampling sapsucker sawmill seed seedlings silvicide Silviculture Simazine soil spraying spruce stands stems streamflow strip-mine sugar maple survival tion treatments U.S. Forest Serv Virginia pine watershed weeding weevil weevil control West Virginia white ash white pine white spruce white-pine weevil wildlife wood wood-using industries wounds York