Index Catalog // ScholarsArchive@OSU

Creator:: Flavell, Thomas H. and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: The larch casebearer, Coleophora laricella (Hubner) was first reported attacking western larch, Larix occidentalis, in Idaho in 1957 (Denton, 1958), 71 years after its introduction into Massachusetts from Europe. The apparent successful regulation of this insect in the eastern U.S. by introduced parasites prompted biological control attempts in the West....
Resource Type:: Technical Report
Full Text:: , Coleophora laricella (Hubner) was first re- ported attacking western larch, Larix occidentalis, in Idaho in

Creator:: Flavell, Thomas H. and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report
Full Text:: for varying periods of time in northern Idaho and western Montana. Most budworm out- breaks have

Creator:: Bousfield, Wayne E., Franc, G. C., and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report
Full Text:: OF WESTERN SPRUCE BUDWORM DAMAGE AREAS ON THE CLEARWATER NATIONAL FOREST IDAHO 1978 By Wayne E

Creator:: Bousfield, Wayne E., Williams, Ralph E., and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report
Full Text:: a small increase in growth was indicated for both western larch and ponderosa pine, it was

Creator:: Bousfield, Wayne E. and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report
Full Text:: INTRODUCTION Western spruce budworm 1/ has been a seri- ous pest in Montana and Idaho Forests for many years

Creator:: Hard, John S., Tunnock, Scott, Eder, Robert G., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Western spruce budworm defoliated area in the Northern Region has differed significantly across three discrete geographic zones during the past decade. Aerially visible defoliation in northern Idaho increased from 1.7 million acres in 1969 to a high of 2.2 million acres in 1974, and declined to none in 1979. Defoliated...
Resource Type:: Technical Report
Full Text:: steep curves for northern Idaho and western Montana than similar plotted curves for eastern Montana. If

Creator:: Tunnock, Scott and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Epidemic populations of the western spruce budworm persist in the Northern Region. Aerial surveys made in August 1976 showed a decline in the acreage of aerially visible defoliation. In northern Idaho, the defoliated area dropped from 831,487 acres in 1975 to 655,711 acres in 1976, down 21 percent. Surveys in...
Resource Type:: Technical Report
Full Text:: DEFOLIATION BY WESTERN SPRUCE BUDWORM IN NORTHERN IDAHO AND MONTANA -- 1977„0- qe. 4F i 977 z (1[1j

Creator:: James, Robert L. and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report
Full Text:: • 1 Forest • Insect & Disease • Management Needle and twig

Creator:: Dewey, Jerald E., Jenkins, Michael J., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Insect damage was extensive to Douglas-fir, ponderosa pine, western white pine, and western larch cones at most seed production areas surveyed in 1979. From 70 to 100 percent of the cones from several collecting periods were injured. Moderate damage (40-70 percent of cones injured) occurred to Douglas-fir, ponderosa pine, western...
Resource Type:: Technical Report
Full Text:: , western white pine, and western larch cones at most seed production areas sur- veyed in 1979. From 70 to

Creator:: Dooling, Oscar J. and United States. Forest Service. Northern Region. State & Private Forestry
Resource Type:: Technical Report
Full Text:: sawflies have been active in western larch stands in Montana and northern Idaho since 1977, but needle

ScholarsArchive@OSU