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Douglas-fir needle midges : determining a spray schedule through use of the midge trap

Creator:: Oregon State University. Extension Service and Sander, Gary H.
Abstract:: Published April 1969. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report
Full Text:: are delicate, orange, two-winged flies about one-eighth inch long; females are stout and Doi4las-fir

Impact of insects on seed production in a Douglas-fir seed orchard in Oregon

Creator:: Dombrosky, Scott A.
Abstract:: The impact of various factors on seed production in a Douglas-fir (Pseudotsuga menziesii) seed orchard in western Oregon was examined by monitoring the fate of seeds in thirty cones, stratified into three crown levels, on each of ten trees during the 1984 growing season. Cones were examined monthly between April...
Resource Type:: Masters Thesis
Full Text:: in the western halves of Oregon, Washington and British Columbia. This tree is highly prized for

Potential for defoliation by western spruce budworm in Douglas-fir stands in Montana, 1976

Creator:: Tunnock, Scott, Flavell, Thomas H., Meyer, Hubert E., and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Aerial surveys of six Montana National Forests in 1975 found a 22.1% increase in the area of visible defoliation caused by the western spruce budworm. It is estimated that 2,278,804 acres of Douglas-fir forests are now suffering at least 25% defoliation. This is an increase of 503,706 acres over the...
Resource Type:: Technical Report
Full Text:: The western spruce budworm, Choristoneura occidentalis Freeman, is a native pest of Douglas-fir

Potential for defoliation by western spruce budworm in Douglas-fir stands in eastern Montana, 1975

Creator:: Tunnock, Scott, United States. Forest Service. Northern Region. Forest Environmental Protection, and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: Aerially visible defoliation by the western spruce budworm, Choristoneura occidentalis Freeman, increased from 149,250 acres in 1973 to 649,319 acres in 1974 on five eastern Montana National Forests. An egg mass survey during the fall of 1974 predicted that additional defoliation will occur in 1975 on 47 of 48 plots...
Resource Type:: Technical Report
Full Text:: MeyerY, and Dennis Hamell/ ABSTRACT Aerially visible defoliation by the western spruce budworm

Cooley spruce gall adelgid control in Douglas-fir Christmas tree plantations, Oregon, 1986

Creator:: Regan, Richard P. and Fisher, Glenn C.
Resource Type:: Conference Proceeding
Full Text:: OR 97331 COOLEY SPRUCE GALL ADELGID CONTROL IN DOUGLAS-FIR CHRISTMAS TREE PLANTATIONS, OREGON, 1986

The infection and colonization of Douglas-fir needles by the Swiss needle cast pathogen, Phaeocryptopus gaeumannii (Rhode) Petrak

Creator:: Capitano, Bryan R.
Abstract:: Phaeocryptopus gaeumannii is a pathogenic fungus on Douglas-fir needles which has become a serious threat to timber production in the last decade along the Oregon coast This research was undertaken to describe the general biology and pathology of F. gaeumannii on Douglas-fir needles and how environmental variables affect fungal development....
Resource Type:: Masters Thesis
Full Text:: on and within Douglas-fir needles or how environmental factors affect disease development. This

Changes in small-mammal populations related to abundance of Douglas-fir seed

Creator:: Hooven, Edward F. (Edward Frank) and Oregon State University. Forest Research Laboratory
Resource Type:: Technical Report
Full Text:: important problem faced by forest managers in the Douglas-fir forests of western Oregon. The forest manager

Early testing of Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco) for Swiss needle cast tolerance

Creator:: Temel, Fatih
Abstract:: The relationship between the level of Phaeocryptopus gaeumannii (Rohde) Petrak colonization and severity of Swiss needle cast (SNC) symptoms, the possibility of early testing of Douglas-fir (Pseudotsuga menziesii var. menziesii [Mirb.] Franco) for SNC tolerance, and geographic variation in coastal Oregon with respect to SNC tolerance were investigated. Comparisons between...
Resource Type:: Dissertation

Damage from laminated root rot at the Black Rock Forest management research area in western Oregon

Creator:: Lawson, Thomas T., Berg, Alan B., Hansen, Everett M., and Oregon State University. Forest Research Laboratory
Resource Type:: Technical Report
Full Text:: root rot of Douglas-fir in western Oregon and Washington. USDA Forest Service Research Paper PNW-102

A three year evaluation of Douglas-fir cone and seed insects in Montana and Yellowstone National Park

Creator:: Dewey, Jerald E. and United States. Forest Service. Northern Region. State & Private Forestry
Abstract:: A 3-year evaluation of Douglas-fir cones in Montana and Yellowstone National Park, Wyoming, showed the western spruce budworm, Choristoneura occidentalis Freeman, and midges were the most common and injurious insects found each year. Injury was so severe at some plots that no sound seeds could be found.
Resource Type:: Technical Report
Full Text:: Evaluation of no.72-1 ;LAS-FIR CONE AND SEED INSECTS itana and Yellowstone National Park • I U. S

ScholarsArchive@OSU

Douglas-fir needle midges : determining a spray schedule through use of the midge trap

Impact of insects on seed production in a Douglas-fir seed orchard in Oregon

Potential for defoliation by western spruce budworm in Douglas-fir stands in Montana, 1976

Potential for defoliation by western spruce budworm in Douglas-fir stands in eastern Montana, 1975

Cooley spruce gall adelgid control in Douglas-fir Christmas tree plantations, Oregon, 1986

The infection and colonization of Douglas-fir needles by the Swiss needle cast pathogen, Phaeocryptopus gaeumannii (Rhode) Petrak

Changes in small-mammal populations related to abundance of Douglas-fir seed

Early testing of Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco) for Swiss needle cast tolerance

Damage from laminated root rot at the Black Rock Forest management research area in western Oregon

A three year evaluation of Douglas-fir cone and seed insects in Montana and Yellowstone National Park

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