Incidence Of Mountain Pine Beetle Abandoned Galleries In Lodgepole Pine

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Mountain Pine Beetle Infestations in Relation to Lodgepole Pine Diameters

Walter E. Cole,Gene D. Amman
Mountain Pine Beetle Infestations in Relation to Lodgepole Pine Diameters Book PDF

Author : Walter E. Cole,Gene D. Amman
Publisher : Unknown
Page : 8 pages
File Size : 46,5 Mb
Release : 1969
Category : Forests and forestry
ISBN : UIUC:30112104065344

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Mountain Pine Beetle Infestations in Relation to Lodgepole Pine Diameters by Walter E. Cole,Gene D. Amman Pdf

Tree losses resulting from infestation by the mountain pine beetle (Dendroctonus ponderosae Hopkins) were measured in two stands of lodgepole pine (Pinus contorta Dougl.) where the beetle population had previously been epidemic. Measurement data showed that larger diameter trees were infested and killed first. Tree losses ranged from 1 percent of trees 4 inches (d.b.h.) to 87 percent of those 16 inches and greater d.b.h. Numbers of adult beetle emergence holes averaged 1.3 per square foot of bark area in trees 7 inches d.b.h. and 62 in trees 28 inches and greater d.b.h. The observations indicate that large infestations of mountain pine beetle depend on the presence of large diameter trees within a stand of lodgepole pine, thus implying that beetle population growth is food-limited.

USDA Forest Service Research Note INT.

Anonim
USDA Forest Service Research Note INT Book PDF

Author : Anonim
Publisher : Unknown
Page : 210 pages
File Size : 51,5 Mb
Release : 1975
Category : Forests and forestry
ISBN : UCBK:C037742532

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USDA Forest Service Research Note INT. by Anonim Pdf

The Mountain Pine Beetle, an Important Enemy of Western Pines

James C. Evenden,William Delles Bedard,George R. Struble
The Mountain Pine Beetle an Important Enemy of Western Pines Book PDF

Author : James C. Evenden,William Delles Bedard,George R. Struble
Publisher : Unknown
Page : 36 pages
File Size : 43,7 Mb
Release : 1943
Category : Mountain pine beetle
ISBN : UIUC:30112019274122

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The Mountain Pine Beetle, an Important Enemy of Western Pines by James C. Evenden,William Delles Bedard,George R. Struble Pdf

Growth of Lodgepole Pine Stands and Its Relation to Mountain Pine Beetle Susceptibility

S. A. Mata
Growth of Lodgepole Pine Stands and Its Relation to Mountain Pine Beetle Susceptibility Book PDF

Author : S. A. Mata
Publisher : Unknown
Page : 24 pages
File Size : 54,6 Mb
Release : 2003
Category : Forests and forestry
ISBN : MINN:31951D03001922G

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Growth of Lodgepole Pine Stands and Its Relation to Mountain Pine Beetle Susceptibility by S. A. Mata Pdf

Periodic diameter and basal area growth were determined for partially cut stands of lodgepole pine at five locations over approximately 10 year periods. After cutting, average diameters in the partially cut plots generally increased by 0.8 inches or more, while average diameter in the uncut controls increased by 0.6 inches or less. Diameter growth in the partially cut plots was generally significantly greater than diameter growth in the controls. Individual tree growth is discussed in relation to potential susceptibility to mountain pine beetle infestation. Basal area decreased in three of the four GSL (growing stock level) 40 stands because of windthrow. Basal area generally increased >1.0 ft 2 / acre/year in partially cut plots except in the GSL 40 stands with substantial windthrow and one GSL 100 with an Armillaria infection pocket. Basal area increases in the control plots ranged from 0.2 to 1.1 ft 2 /acre/year, although the one control with a BA growth rate of 1.1 ft 2 /acre/year had a relatively low initial BA. Data from the stands are employed in the susceptibility rating methods of Amman et al.(1977), Shore and Safranyik (1992),and Anhold et al. (1996 to determine stand susceptibility and the results discussed in terms of general applicability of these methods to partially cut stands. Basal area growth is used to estimate the length of time required for various stand densities to reach specific susceptibility thresholds for mountain pine beetle infestation. Several of the GSL 40 stands are not projected to reach the susceptibility thresholds in 100 years because of windthrow. Barring mortality 1%,GSL 80 stands are estimated to reach the basal area threshold of 120 ft 2 per acre in

Mountain Pine Beetle in Ponderosa Pine

Gene D. Amman
Mountain Pine Beetle in Ponderosa Pine Book PDF

Author : Gene D. Amman
Publisher : Unknown
Page : 12 pages
File Size : 52,9 Mb
Release : 1986
Category : Beetles
ISBN : MINN:31951D02965889L

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Mountain Pine Beetle in Ponderosa Pine by Gene D. Amman Pdf