Western spruce budworm in Idaho and Montana, 1976: status, impacts, and control alternatives for western spruce budworm in Idaho & Montana
U.S. Department of Agriculture, Forest Service, Northern Region, State and Private Forestry, Forest Environmental Protection, 1976 - Spruce bud-worm - 12 pages
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1,000 square inches 1976 will provide Acceptable Defoliation Aerial applications Agriculture Forest Service/Northern bark beetles buds budworm feeding BUDWORM IN IDAHO budworm infestations budworm management Coeur d'Alene cone days under field defoliation in 1977 Douglas-fir egg mass survey Engelmann spruce EPA Reg favor pine fluid ounces Forest Environmental Protection Forest Forest Service Forest P.O. Box Forest Service Building Forest Service/Northern Region forest tent caterpillar Forestry Forest Environmental full grown fungi gypsy moth heavy defoliation Helena National Forest host trees impacts inch long inches of foliage infested areas infested Fig Intermountain and Northern lodgepole pine Malathion management objectives Missoula Moths usually National Forest Forest National Forest P.O. needles and tips Orthene killed pine sawfly pole-size pound active Private Forestry Forest Pupae reduce budworm Sevin 4-0il shoot growth begins spruce budworm Eggs spruce budworm epidemic spruce budworm larva spruce budworm population top kill tree mortality true fir U.S. Department webs western spruce budworm