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Creator:: Gibson, Kenneth E., Oakes, Robert D., and United States. Forest Service. Northern Region
Resource Type:: Technical Report
Full Text:: northern Idaho and extreme western Montana which have a history of root disease. Trees in those stands have

Creator:: Gibson, Kenneth E., Oakes, Robert D., and United States. Forest Service. Northern Region
Resource Type:: Technical Report
Full Text:: determined by precipitation and resultant condition of host trees. Fir Engraver (FE) Fir engraver, a pest

Creator:: Gibson, Kenneth E., Oakes, Robert D., and United States. Forest Service. Northern Region
Resource Type:: Technical Report
Full Text:: Table 1 Acres under Federal jurisdiction in the Northern Region 4 Table 2 Acres of State and private

Creator:: James, Robert L., Woo, John You, and United States. Forest Service. Northern Region
Resource Type:: Technical Report
Full Text:: . Diseases Of forest and shade trees of the United States. USDA Forest Service, AO. Handbook 386. 658p. kat

Creator:: Gibson, Kenneth E., Oakes, Robert D., and United States. Forest Service. Northern Region
Resource Type:: Technical Report
Full Text:: Lolo National Forests (NF), the Northern Cheyenne Indian Reservation (IR), and adjacent State and

Creator:: Dooling, Oscar J., Johnson, Ralph R., Eder, Robert G., and United States. Forest Service. Northern Region
Abstract:: A permanent study was established in 1970 and 1971 to measure the impact, spread, and intensification of dwarf mistletoe on precommercially thinned Douglas-fir and lodgepole pine in Montana. Mean diameter growth on all plots was reduced 21 percent in Douglas-fir, but the reduction is only significant at the 0.15 level....
Resource Type:: Technical Report
Full Text:: trees in the study, increased from 3.4 percent in 1970 to 9.2 percent in 1983 in Douglas-fir, and from

Creator:: Dooling, Oscar J., Gibson, Kenneth E., and United States. Forest Service. Northern Region
Abstract:: Potential problem pests found were Armillaria root disease, pocket gopher, western pine shoot borer, and white pine blister rust. Early detection of problem pests allows management actions to be taken if needed to prevent serious impacts. Unit managers should check the areas periodically and call on pest management specialists to...
Resource Type:: Technical Report
Full Text:: Forest Pest Management SDP/ 43 INSECT AND DISEASE SURVEYS41

Creator:: Gibson, Kenneth E., McGregor, Mark D., Oakes, Robert D., and United States. Forest Service. Northern Region
Abstract:: The mountain pine beetle infestation existing on the Crow Indian Reservation (IR) since the early 1970's, and later developing principally in the western portion of the Northern Cheyenne IR, continued into 1984. Survey results indicate the infestation is still building on both Reservations. To help develop beetle management strategies appropriate...
Resource Type:: Technical Report
Full Text:: devastating pest of pine species throughout the western United States, continued to deplete second-growth

Creator:: McGregor, Mark D., Oakes, Robert D., Meyer, Hubert E., and United States. Forest Service. Northern Region
Abstract:: A granular controlled release formulation of 2 percent MCH was applied at 4.48 kg/ha to 76.9 ha of uninfested, windthrown Douglas-fir by helicopter with a modified aerial spreader of 1.12 m capacity in May 1982. Douglas-fir beetle population reduction was 96.4 percent by late June. With one exception, treated plots...
Resource Type:: Technical Report
Full Text:: windthrown trees, and to protect adjacent high-value stands. INTRODUCTION The Douglas-fir beetle ' (DFB

Creator:: Tunnock, Scott and United States. Forest Service. Northern Region
Abstract:: A rare outbreak of hemlock sawfly, Neodiprion tsugae Middleton, was detected in August in drainages near the Canadian border in Idaho infesting several thousand acres. Some stands of western hemlock and subalpine fir were severely defoliated. Understory Engelmann spruce trees were lightly defoliated. The sawfly overwinters in the egg stage...
Resource Type:: Technical Report
Full Text:: ) state that adverse weather (cold, wet summers and falls), a fungus disease, parasites, and depletion of

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