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• 1. [Article] Ground application of dimethoate (Cygon) for the control of cone and seed destroying insects of Douglas-fir and grand fir

  Two concentrations of dimethoate were applied with a hydraulic ground sprayer to cone-bearing Douglas-fir and grand fir trees. Single application (mid-June) and a double application (mid-June and mid-July) ...

  Citation × Citation Citation Abstract Copy Title: Ground application of dimethoate (Cygon) for the control of cone and seed destroying insects of Douglas-fir and grand fir Author: Dewey, Jerald E., United States. Forest Service. Northern Region. Forest Environmental Protection, United States. Forest Service. Northern Region. State & Private Forestry Two concentrations of dimethoate were applied with a hydraulic ground sprayer to cone-bearing Douglas-fir and grand fir trees. Single application (mid-June) and a double application (mid-June and mid-July) were compared. Three of the four treatments applied to Douglas-fir resulted in a significantly higher number of sound seeds produced per cone compared to untreated cones. No seed protection was exhibited in the grand fir treatments. Title: Ground application of dimethoate (Cygon) for the control of cone and seed destroying insects of Douglas-fir and grand fir Author: Dewey, Jerald E., United States. Forest Service. Northern Region. Forest Environmental Protection, United States. Forest Service. Northern Region. State & Private Forestry Two concentrations of dimethoate were applied with a hydraulic ground sprayer to cone-bearing Douglas-fir and grand fir trees. Single application (mid-June) and a double application (mid-June and mid-July) were compared. Three of the four treatments applied to Douglas-fir resulted in a significantly higher number of sound seeds produced per cone compared to untreated cones. No seed protection was exhibited in the grand fir treatments. Close

• 2. [Article] Some observations on the impact of western spruce budworm on the Clearwater National Forest, Idaho

  Citation × Citation Citation Abstract Copy Title: Some observations on the impact of western spruce budworm on the Clearwater National Forest, Idaho Author: Dewey, Jerald E., Underwood, P. W., United States. Forest Service. Northern Region. State & Private Forestry, Franc, G. C. Title: Some observations on the impact of western spruce budworm on the Clearwater National Forest, Idaho Author: Dewey, Jerald E., Underwood, P. W., United States. Forest Service. Northern Region. State & Private Forestry, Franc, G. C. Close

• 3. [Article] A western spruce budworm impact survey on the Clearwater National Forest

  Citation × Citation Citation Abstract Copy Title: A western spruce budworm impact survey on the Clearwater National Forest Author: Dewey, Jerald E., Franc, G. C., United States. Forest Service. Northern Region. State & Private Forestry, Underwood, P. W. Title: A western spruce budworm impact survey on the Clearwater National Forest Author: Dewey, Jerald E., Franc, G. C., United States. Forest Service. Northern Region. State & Private Forestry, Underwood, P. W. Close

• 4. [Article] Summary of forest insect and disease conditions in the Northern Region, 1980

  Citation × Citation Citation Abstract Copy Title: Summary of forest insect and disease conditions in the Northern Region, 1980 Author: Dewey, Jerald E., United States. Forest Service. Northern Region. State & Private Forestry, James, Robert L. Title: Summary of forest insect and disease conditions in the Northern Region, 1980 Author: Dewey, Jerald E., United States. Forest Service. Northern Region. State & Private Forestry, James, Robert L. Close

• 5. [Article] A pine butterfly impact survey on the Bitterroot National Forest and state of Montana lands, 1973

  Citation × Citation Citation Abstract Copy Title: A pine butterfly impact survey on the Bitterroot National Forest and state of Montana lands, 1973 Author: Dewey, Jerald E., United States. Forest Service. Northern Region. State & Private Forestry Title: A pine butterfly impact survey on the Bitterroot National Forest and state of Montana lands, 1973 Author: Dewey, Jerald E., United States. Forest Service. Northern Region. State & Private Forestry Close

• 6. [Article] A pine butterfly impact survey on the Bitterroot National Forest and state of Montana lands, 1972

  Citation × Citation Citation Abstract Copy Title: A pine butterfly impact survey on the Bitterroot National Forest and state of Montana lands, 1972 Author: Dewey, Jerald E., United States. Forest Service. Northern Region. State & Private Forestry Title: A pine butterfly impact survey on the Bitterroot National Forest and state of Montana lands, 1972 Author: Dewey, Jerald E., United States. Forest Service. Northern Region. State & Private Forestry Close

• 7. [Article] Status of the western false hemlock looper infestation in the Upper Flathead Valley, Montana, 1974

  Citation × Citation Citation Abstract Copy Title: Status of the western false hemlock looper infestation in the Upper Flathead Valley, Montana, 1974 Author: Dewey, Jerald E., Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, Kohler, Steve Title: Status of the western false hemlock looper infestation in the Upper Flathead Valley, Montana, 1974 Author: Dewey, Jerald E., Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, Kohler, Steve Close

• 8. [Article] Evaluation of the pine butterfly infestation on the Nezperce National Forest, 1972

  The pine butterfly, Neophasia menapia (Felder and Felder), infestation on the Nezperce National Forest was aerially surveyed in mid-August 1972. A followup ground evaluation was made in September. Results ...

  Citation × Citation Citation Abstract Copy Title: Evaluation of the pine butterfly infestation on the Nezperce National Forest, 1972 Author: Dewey, Jerald E., United States. Forest Service. Northern Region. State & Private Forestry, Ciesla, William M. The pine butterfly, Neophasia menapia (Felder and Felder), infestation on the Nezperce National Forest was aerially surveyed in mid-August 1972. A followup ground evaluation was made in September. Results of the survey show the infestation has increased substantially in intensity and size. The infestation was first reported in 1971 when 4,200 acres of aerially visible defoliation were detected along the south-facing slopes of the Salmon River breaks east of Riggins, Idaho. Approximately 22,000 acres of defoliation were mapped during the 1972 aerial survey. In addition to the infested areas east of Riggins, defoliation exists as far north as Slate Creek and also on the "island" to the south (Fig. 1). Defoliation intensities range from just detectable to complete removal of the foliage. Most of the trees still have their 1972 needles. Title: Evaluation of the pine butterfly infestation on the Nezperce National Forest, 1972 Author: Dewey, Jerald E., United States. Forest Service. Northern Region. State & Private Forestry, Ciesla, William M. The pine butterfly, Neophasia menapia (Felder and Felder), infestation on the Nezperce National Forest was aerially surveyed in mid-August 1972. A followup ground evaluation was made in September. Results of the survey show the infestation has increased substantially in intensity and size. The infestation was first reported in 1971 when 4,200 acres of aerially visible defoliation were detected along the south-facing slopes of the Salmon River breaks east of Riggins, Idaho. Approximately 22,000 acres of defoliation were mapped during the 1972 aerial survey. In addition to the infested areas east of Riggins, defoliation exists as far north as Slate Creek and also on the "island" to the south (Fig. 1). Defoliation intensities range from just detectable to complete removal of the foliage. Most of the trees still have their 1972 needles. Close

• 9. [Article] An evaluation of cone and seed insects in selected seed production areas in Region 1, progress report

  An evaluation was made in 21 seed production areas and 1 seed orchard in Region 1 to identify the primary insect pests and to assess amount of injury caused. Cones from Douglas-fir, grand fir, western ...

  Citation × Citation Citation Abstract Copy Title: An evaluation of cone and seed insects in selected seed production areas in Region 1, progress report Author: Dewey, Jerald E., United States. Forest Service. Northern Region. State & Private Forestry, Jenkins, Michael J. An evaluation was made in 21 seed production areas and 1 seed orchard in Region 1 to identify the primary insect pests and to assess amount of injury caused. Cones from Douglas-fir, grand fir, western larch, lodgepole pine, ponderosa pine, and western white pine were collected periodically and examined. The primary insect species observed were western spruce budworm on Douglas-fir, grand fir, and western larch; midges on Douglas fir, grand fir, western larch, ponderosa pine, and lodgepole pine; coneworms on Douglas-fir, grand fir, western larch, and ponderosa pine; and the Douglas-fir cone moth on Douglas-fir. Title: An evaluation of cone and seed insects in selected seed production areas in Region 1, progress report Author: Dewey, Jerald E., United States. Forest Service. Northern Region. State & Private Forestry, Jenkins, Michael J. An evaluation was made in 21 seed production areas and 1 seed orchard in Region 1 to identify the primary insect pests and to assess amount of injury caused. Cones from Douglas-fir, grand fir, western larch, lodgepole pine, ponderosa pine, and western white pine were collected periodically and examined. The primary insect species observed were western spruce budworm on Douglas-fir, grand fir, and western larch; midges on Douglas fir, grand fir, western larch, ponderosa pine, and lodgepole pine; coneworms on Douglas-fir, grand fir, western larch, and ponderosa pine; and the Douglas-fir cone moth on Douglas-fir. Close

• 10. [Article] Status of the western hemlock looper in the northern region, 1972

  Over 10,000 acres of aerially visible western hemlock looper defoliation on grand fir was detected on State and Federal forests of central Idaho in 1972. This is the first report of this insect building ...

  Citation × Citation Citation Abstract Copy Title: Status of the western hemlock looper in the northern region, 1972 Author: Dewey, Jerald E., United States. Forest Service. Northern Region. State & Private Forestry, Ciesla, William M., Lood, Rudolph C. Over 10,000 acres of aerially visible western hemlock looper defoliation on grand fir was detected on State and Federal forests of central Idaho in 1972. This is the first report of this insect building up in Region 1 since a widespread outbreak in 1937-39. The western hemlock looper has the potential of being one of the most destructive forest insects in North America. It can cause tree mortality in 1 or 2 years of feeding. Extensive tree mortality has been associated with nearly all past outbreaks. Outbreaks usually persist for about 3 years at epidemic levels prior to collapsing from natural control agents. Insecticides have been effective in protecting large stands during some looper infestations. Title: Status of the western hemlock looper in the northern region, 1972 Author: Dewey, Jerald E., United States. Forest Service. Northern Region. State & Private Forestry, Ciesla, William M., Lood, Rudolph C. Over 10,000 acres of aerially visible western hemlock looper defoliation on grand fir was detected on State and Federal forests of central Idaho in 1972. This is the first report of this insect building up in Region 1 since a widespread outbreak in 1937-39. The western hemlock looper has the potential of being one of the most destructive forest insects in North America. It can cause tree mortality in 1 or 2 years of feeding. Extensive tree mortality has been associated with nearly all past outbreaks. Outbreaks usually persist for about 3 years at epidemic levels prior to collapsing from natural control agents. Insecticides have been effective in protecting large stands during some looper infestations. Close