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• 1. [Article] Potential for defoliation of ponderosa pine stands by pine butterfly on the Bitterroot and Lolo National Forests, Montana in 1972

  Epidemic levels of the pine butterfly, Neophasia menapia (Felder and Felder) have been evident in ponderosa pine stands in the Bitter Root Valley since 1969. Evaluations of this infestation were initiated ...

  Citation × Citation Citation Abstract Copy Title: Potential for defoliation of ponderosa pine stands by pine butterfly on the Bitterroot and Lolo National Forests, Montana in 1972 Author: Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, Bousfield, Wayne E. Epidemic levels of the pine butterfly, Neophasia menapia (Felder and Felder) have been evident in ponderosa pine stands in the Bitter Root Valley since 1969. Evaluations of this infestation were initiated in 1970 to assess overwintering egg populations at 20 locations within the infestation (Ciesla et al. 1971). Defoliation was estimated following the feeding period in 1971 and a linear regression model was computed using defoliation as the dependent variable and egg density as the independent variable (Bousfield and Ciesla 1971). The purpose of this study was to provide a basis for predicting future population levels. The objective of this evaluation is to test the prediction model, forecast 1972 defoliation potential, and to obtain additional biological information on the infestation. Title: Potential for defoliation of ponderosa pine stands by pine butterfly on the Bitterroot and Lolo National Forests, Montana in 1972 Author: Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, Bousfield, Wayne E. Epidemic levels of the pine butterfly, Neophasia menapia (Felder and Felder) have been evident in ponderosa pine stands in the Bitter Root Valley since 1969. Evaluations of this infestation were initiated in 1970 to assess overwintering egg populations at 20 locations within the infestation (Ciesla et al. 1971). Defoliation was estimated following the feeding period in 1971 and a linear regression model was computed using defoliation as the dependent variable and egg density as the independent variable (Bousfield and Ciesla 1971). The purpose of this study was to provide a basis for predicting future population levels. The objective of this evaluation is to test the prediction model, forecast 1972 defoliation potential, and to obtain additional biological information on the infestation. Close

• 2. [Article] A ponderosa pine needle miner outbreak in the Flathead Indian Reservation and Missoula Valley and potential defoliation for 1978

  Citation × Citation Citation Abstract Copy Title: A ponderosa pine needle miner outbreak in the Flathead Indian Reservation and Missoula Valley and potential defoliation for 1978 Author: Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, Tunnock, Scott Title: A ponderosa pine needle miner outbreak in the Flathead Indian Reservation and Missoula Valley and potential defoliation for 1978 Author: Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, Tunnock, Scott Close

• 3. [Article] Status of mountain pine beetle on the Bitterroot National Forest, Montana and Idaho, 1974

  Mountain pine beetle activity has increased from about 350 infested trees in 1972 to over 1,200 infested trees in 1974 on the Bitterroot National Forest. The majority of infestation occurs in second-growth, ...

  Citation × Citation Citation Abstract Copy Title: Status of mountain pine beetle on the Bitterroot National Forest, Montana and Idaho, 1974 Author: Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, Hemel, Dennis R., McGregor, Mark D. Mountain pine beetle activity has increased from about 350 infested trees in 1972 to over 1,200 infested trees in 1974 on the Bitterroot National Forest. The majority of infestation occurs in second-growth, overstocked, ponderosa pine stands in the West Fork Bitterroot drainage. An increase in number of trees killed is expected in 1975. Commercial thinning is encouraged to remove infested trees and improve stand vigor to reduce the infestation to endemic levels. Title: Status of mountain pine beetle on the Bitterroot National Forest, Montana and Idaho, 1974 Author: Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, Hemel, Dennis R., McGregor, Mark D. Mountain pine beetle activity has increased from about 350 infested trees in 1972 to over 1,200 infested trees in 1974 on the Bitterroot National Forest. The majority of infestation occurs in second-growth, overstocked, ponderosa pine stands in the West Fork Bitterroot drainage. An increase in number of trees killed is expected in 1975. Commercial thinning is encouraged to remove infested trees and improve stand vigor to reduce the infestation to endemic levels. Close

• 4. [Article] Potential for defoliation by western spruce budworm in Douglas-fir stands in Montana, 1976

  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 ...

  Citation × Citation Citation Abstract Copy Title: Potential for defoliation by western spruce budworm in Douglas-fir stands in Montana, 1976 Author: Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, Flavell, Thomas H., Tunnock, Scott 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 1,775,098 acres defoliated in 1974. Egg mass surveys were made in infested areas to predict the degree of defoliation in 1976. Based on this survey, the following mean percent defoliation is predicted for each National Forest: Deerlodge, 56%; Helena, 57%; Gallatin, 29%; Beaverhead, 37%; Flathead, 5%; Lolo, 24%. Title: Potential for defoliation by western spruce budworm in Douglas-fir stands in Montana, 1976 Author: Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, Flavell, Thomas H., Tunnock, Scott 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 1,775,098 acres defoliated in 1974. Egg mass surveys were made in infested areas to predict the degree of defoliation in 1976. Based on this survey, the following mean percent defoliation is predicted for each National Forest: Deerlodge, 56%; Helena, 57%; Gallatin, 29%; Beaverhead, 37%; Flathead, 5%; Lolo, 24%. Close

• 5. [Article] Evaluation of mountain pine beetle infestation, Hebgen Lake Ranger District, Gallatin National Forest, Montana, 1978

  Mountain pine beetle populations developed to epidemic level in 1970 on the Hebgen Lake Ranger District. Infested acreage increased from 78,000 in 1977 to 79,061 in 1978. More than 4 million trees (238 ...

  Citation × Citation Citation Abstract Copy Title: Evaluation of mountain pine beetle infestation, Hebgen Lake Ranger District, Gallatin National Forest, Montana, 1978 Author: Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, McGregor, Mark D., Bennett, D. D. Mountain pine beetle populations developed to epidemic level in 1970 on the Hebgen Lake Ranger District. Infested acreage increased from 78,000 in 1977 to 79,061 in 1978. More than 4 million trees (238 MMBF) were killed in 1978. Cold temperatures during December 1978 may cause a significant decline in the beetle population, resulting in a decline in the number of newly attacked trees in 1979. Potential mortality from the beetle can be reduced and prevented through an accelerated program of (1) logging infested trees, and (2) silvicultural treatment of green and infested stands to reduce the inventory of large diameter highly preferred trees. High valued lodgepole pine in recreation and administrative sites should be sprayed with the preventative chemical, Sevimo1-4, to protect trees from beetle attack until the epidemic declines. Title: Evaluation of mountain pine beetle infestation, Hebgen Lake Ranger District, Gallatin National Forest, Montana, 1978 Author: Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, McGregor, Mark D., Bennett, D. D. Mountain pine beetle populations developed to epidemic level in 1970 on the Hebgen Lake Ranger District. Infested acreage increased from 78,000 in 1977 to 79,061 in 1978. More than 4 million trees (238 MMBF) were killed in 1978. Cold temperatures during December 1978 may cause a significant decline in the beetle population, resulting in a decline in the number of newly attacked trees in 1979. Potential mortality from the beetle can be reduced and prevented through an accelerated program of (1) logging infested trees, and (2) silvicultural treatment of green and infested stands to reduce the inventory of large diameter highly preferred trees. High valued lodgepole pine in recreation and administrative sites should be sprayed with the preventative chemical, Sevimo1-4, to protect trees from beetle attack until the epidemic declines. Close

• 6. [Article] A pilot project evaluating trichlorfon and acephate for managing the western spruce budworm, Choristoneura occidentalis Freeman, Helena National Forest, Montana, 1976

  A pilot project to evaluate trichlorfon and acephate for suppressing western spruce budworm populations was conducted on the Helena National Forest, Montana. Both insecticides were applied at 1 pound active ingredient ...

  Citation × Citation Citation Abstract Copy Title: A pilot project evaluating trichlorfon and acephate for managing the western spruce budworm, Choristoneura occidentalis Freeman, Helena National Forest, Montana, 1976 Author: Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, Flavell, Thomas H., Tunnock, Scott A pilot project to evaluate trichlorfon and acephate for suppressing western spruce budworm populations was conducted on the Helena National Forest, Montana. Both insecticides were applied at 1 pound active ingredient per acre. Application was made with a Bell 205A helicopter using eight Beecomist Model 350 spray heads. Treatments and controls were replicated three times. Each replicate covered approximately 1,000 acres. Treatments were applied under a population reduction strategy. The effects of treatments on fish and aquatic organisms and budworm parasites were monitored. Covariance analysis of budworm larval populations 10 days after spraying showed that trichlorfon and acephate gave 59.53 and 86.86 percent control respectively. The degree of foliage protection was estimated at 13.67 percent for trichlorfon and 11.80 percent for acephate. Treatments did not have a significant effect on budworm parasites, fish, or aquatic organisms. Title: A pilot project evaluating trichlorfon and acephate for managing the western spruce budworm, Choristoneura occidentalis Freeman, Helena National Forest, Montana, 1976 Author: Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, Flavell, Thomas H., Tunnock, Scott A pilot project to evaluate trichlorfon and acephate for suppressing western spruce budworm populations was conducted on the Helena National Forest, Montana. Both insecticides were applied at 1 pound active ingredient per acre. Application was made with a Bell 205A helicopter using eight Beecomist Model 350 spray heads. Treatments and controls were replicated three times. Each replicate covered approximately 1,000 acres. Treatments were applied under a population reduction strategy. The effects of treatments on fish and aquatic organisms and budworm parasites were monitored. Covariance analysis of budworm larval populations 10 days after spraying showed that trichlorfon and acephate gave 59.53 and 86.86 percent control respectively. The degree of foliage protection was estimated at 13.67 percent for trichlorfon and 11.80 percent for acephate. Treatments did not have a significant effect on budworm parasites, fish, or aquatic organisms. Close

• 7. [Article] Status of mountain pine beetle infestation, Bozeman-Gallatin Ranger District, Gallatin National Forest, 1977

  Mountain pine beetle populations developed to epidmic level on the Bozeman-Gallatin Ranger District in 1969. Approximately 146,000 acres are currently infested. Since 1969, over 350 MMBF have been killed. It ...

  Citation × Citation Citation Abstract Copy Title: Status of mountain pine beetle infestation, Bozeman-Gallatin Ranger District, Gallatin National Forest, 1977 Author: Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, Hamel, Dennis R., McGregor, Mark D. Mountain pine beetle populations developed to epidmic level on the Bozeman-Gallatin Ranger District in 1969. Approximately 146,000 acres are currently infested. Since 1969, over 350 MMBF have been killed. It is predicted that over 4 million trees could be killed in 1978. Infestation is predicted to intensify in high-hazard stands. Populations have declined in areas where infestation first developed in 1969. Potential losses can be reduced through an accelerated program of (1) sanitation salvage cutting and (2) silvicultural management. High hazard stands should receive first priority. Title: Status of mountain pine beetle infestation, Bozeman-Gallatin Ranger District, Gallatin National Forest, 1977 Author: Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, Hamel, Dennis R., McGregor, Mark D. Mountain pine beetle populations developed to epidmic level on the Bozeman-Gallatin Ranger District in 1969. Approximately 146,000 acres are currently infested. Since 1969, over 350 MMBF have been killed. It is predicted that over 4 million trees could be killed in 1978. Infestation is predicted to intensify in high-hazard stands. Populations have declined in areas where infestation first developed in 1969. Potential losses can be reduced through an accelerated program of (1) sanitation salvage cutting and (2) silvicultural management. High hazard stands should receive first priority. Close

• 8. [Article] Evaluation of pine butterfly infestations on the Flathead Indian Reservation, Montana, 1977

  Citation × Citation Citation Abstract Copy Title: Evaluation of pine butterfly infestations on the Flathead Indian Reservation, Montana, 1977 Author: Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, Tunnock, Scott Title: Evaluation of pine butterfly infestations on the Flathead Indian Reservation, Montana, 1977 Author: Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, Tunnock, Scott Close

• 9. [Article] Status of mountain pine beetle, Northern Region, 1982

  Citation × Citation Citation Abstract Copy Title: Status of mountain pine beetle, Northern Region, 1982 Author: United States. Forest Service. Northern Region. Cooperative Forestry & Pest Management, Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, Oakes, Robert D., McGregor, Mark D. Title: Status of mountain pine beetle, Northern Region, 1982 Author: United States. Forest Service. Northern Region. Cooperative Forestry & Pest Management, Meyer, Hubert E., United States. Forest Service. Northern Region. State & Private Forestry, Oakes, Robert D., McGregor, Mark D. Close

• 10. [Article] Status of western false hemlock looper infestation in the upper Flathead Valley, Montana

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