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Author : J. M. Schmid
Publisher : Unknown
Page : 4 pages
File Size : 55,6 Mb
Release : 1992
Category : Mountain pine beetle
ISBN : MINN:31951D02964931H
Author : J. M. Schmid,S. A. Mata,Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.),United States. Forest Service
Publisher : Unknown
Page : 4 pages
File Size : 55,6 Mb
Release : 1992
Category : Mountain pine beetle
ISBN : OCLC:223716402
Author : J. M. Schmid
Publisher : Unknown
Page : 16 pages
File Size : 53,6 Mb
Release : 2005
Category : Black Hills National Forest (S.D. and Wyo.)
ISBN : MINN:31951D03001940E
Author : J. M. Schmid
Publisher : Unknown
Page : 4 pages
File Size : 50,9 Mb
Release : 1994
Category : Mountain pine beetle
ISBN : MINN:31951D02964942C
Author : Charles Sartwell,Robert E. Dolph
Publisher : Unknown
Page : 8 pages
File Size : 55,9 Mb
Release : 1976
Category : Forests and forestry
ISBN : MINN:31951P01093964C
Author : J. M. Schmid
Publisher : Unknown
Page : 8 pages
File Size : 53,7 Mb
Release : 2009
Category : Black Hills National Forest (S.D. and Wyo.)
ISBN : STANFORD:36105133375688
Mountain pine beetle-killed ponderosa pine trees in three stands of different stocking levels near Bear Mountain in the Black Hills National Forest were surveyed over a 5-year period to determine how long they persisted as unbroken snags. Rate of breakage varied during the first 5 years after MPB infestation: only one tree broke during the first 2 years in the three stands; breakage increased during the third year; the highest percentage of snags broke during the fourth year; and 10% to 14% broke in the fifth year. Cumulatively, snag breakage was 76%, 91%, and 95% in a GSL 80/90, GSL 100/110, and unmanaged stand, respectively. On average, 56% of the snags broke below 25 ft. The rate and height of breakage in mountain pine beetle-killed trees indicates that they are unlikely to persist as suitable snags for more than 5 to 10 years after infestation.
Author : Anonim
Publisher : Unknown
Page : 20 pages
File Size : 48,8 Mb
Release : 1999
Category : Mountain pine beetle
ISBN : MINN:31951D02977849H
Ten-year diameter and basal area growth were determined for partially cut stands at 4 locations. Average diameters in the partially cut plots generally increased by 1 inch or more, while average diameter in the uncut controls increased by 0.9 inches or less. Individual tree growth is discussed in relation to potential susceptibility to mountain pine beetle infestation. Basal area increases ranged from 0.9 to 1.9 ft2/acre/ yr in partially cut plots, while basal area increases in the control plots ranged from 0.4 to 1.4 ft2/acre/yr. Endemic mountain pine beetle infestations and snow breakage accounted for most of the mortality on the plots, which decreased the residual basal area and basal area growth. Increases in basal area are used to estimate the length of time required for various stand densities to reach the susceptibility thresholds for mountain pine beetle infestation. Stand marking may influence future susceptibility to beetle infestations.
Author : Anonim
Publisher : Unknown
Page : 12 pages
File Size : 48,5 Mb
Release : 1994
Category : Beetles
ISBN : MINN:31951D029649472
Author : William F. McCambridge
Publisher : Unknown
Page : 12 pages
File Size : 48,8 Mb
Release : 1982
Category : Mountain pine beetle
ISBN : UIUC:30112004660731
From 1965 to 1978, mountain pine beetles killed 25% of the pines taller than 4.5 feet in a study area in north-central Colorado. Average basal area was reduced from 92 to 58 square feet per acre. Mortality increased with tree diameter up to about 9 inches d.b.h. Larger trees appeared to be killed at random. Mortality was directly related to number of trees per acre and presence of dwarf mistletoe, but not to site index, elevation, and percent Douglas-fir in the stand.
Author : S. A. Mata
Publisher : Unknown
Page : 24 pages
File Size : 47,6 Mb
Release : 2003
Category : Forests and forestry
ISBN : MINN:31951D03001922G
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
Author : William F. McCambridge
Publisher : Unknown
Page : 4 pages
File Size : 44,8 Mb
Release : 1982
Category : Forest thinning
ISBN : UIUC:30112104058729
Author : Pacific Forestry Centre,Mountain Pine Beetle Initiative (Canada)
Publisher : Unknown
Page : 304 pages
File Size : 55,9 Mb
Release : 2006
Category : Forest management
ISBN : 0662426231
"This book presents a synthesis of published information on mountain pine beetle (Dendroctonus ponderosae Hopkins [Coleoptera: Scolytidae]) biology and management with an emphasis on lodgepole pine (Pinus contorta Dougl. ex Loud. var. latifolia Engelm.) forests of western Canada. Intended as a reference for researchers as well as forest managers, the book covers three main subject areas: mountain pine beetle biology, management, and socioeconomic concerns. The chapters on biology cover taxonomy, life history and habits, distribution, insect-host tree interactions, development and survival, epidemiology, and outbreak history. The management section covers management strategy, survey and detection, proactive and preventive management, and decision support tools. The chapters on socioeconomic aspects include an economic examination of management programs and the utilization of post-beetle salvage timber in solid wood, panelboard, pulp and paper products."--Publisher's description.
Author : David C. Chojnacky
Publisher : Unknown
Page : 16 pages
File Size : 49,7 Mb
Release : 2000
Category : Mountain pine beetle
ISBN : MINN:31951D03001933B
Two empirical methods for rating susceptibility of mountain pine beetle attack in ponderosa pine were evaluated. The methods were compared to stand data modeled to objectively rate each sampled stand for susceptibly to bark-beetle attack. Data on bark-beetle attacks, from a survey of 45 sites throughout the Colorado Plateau, were modeled using logistic regression to estimate the probability of attack on individual trees from tree and stand variables. The logistic model allowed flexibility to easily scale results up to a stand level for comparison to the empirical methods. The empirical method, developed by Munson and Anhold, most closely correlated to the logistic regression results. However, the Munson/Anhold method rated all 45 study sites as either moderately or highly susceptible to bark-beetle attack, which raises concern about its lack of sensitivity. Future work on evaluating risk of bark-beetle impact should consider more than stand characteristics.
Author : P. H. Cochran
Publisher : Unknown
Page : 36 pages
File Size : 50,8 Mb
Release : 1995
Category : Forest health
ISBN : MINN:31951D029773645
Author : Anonim
Publisher : Unknown
Page : 178 pages
File Size : 40,6 Mb
Release : 1992
Category : Forests and forestry
ISBN : UCR:31210016017368
