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Author : Walter E. Cole
Publisher : Unknown
Page : 24 pages
File Size : 48,5 Mb
Release : 1983
Category : Mountain pine beetle
ISBN : MINN:31951D02889265Y
Author : Walter E. Cole
Publisher : Unknown
Page : 24 pages
File Size : 47,9 Mb
Release : 1983
Category : Mountain pine beetle
ISBN : UIUC:30112104054934
Author : S. A. Mata
Publisher : Unknown
Page : 24 pages
File Size : 50,5 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 : Michael A. Wulder
Publisher : Unknown
Page : 28 pages
File Size : 45,8 Mb
Release : 2007
Category : Nature
ISBN : MINN:31951D02376445G
This study is part of a series of research papers that explore the biological, social, and economic aspects of British Columbia's mountain pine beetle epidemic. The objective of this study is to compare two different approaches for calculating beetle pressure, and to assess the impact these approaches have on the subsequent calculation of risk ratings. To meet this objective, beetle pressure was calculated using the traditional distance-based model, as well as using an alternative density-based model, implemented with a Voronoi tessellation generated from helicopter-GPS point survey data of known beetle infestation locations.--Includes text from document.
Author : Walter E. Cole,Gene D. Amman
Publisher : Unknown
Page : 8 pages
File Size : 52,8 Mb
Release : 1969
Category : Forests and forestry
ISBN : UIUC:30112104065344
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.
Author : Anonim
Publisher : Unknown
Page : 32 pages
File Size : 53,7 Mb
Release : 1988
Category : Forest regeneration
ISBN : MINN:31951D029882711
Author : Stephen E. McDonald
Publisher : Unknown
Page : 810 pages
File Size : 47,6 Mb
Release : 1981
Category : Electronic
ISBN : STANFORD:36105119573538
Author : Gene D. Amman
Publisher : Unknown
Page : 12 pages
File Size : 47,8 Mb
Release : 1985
Category : Mountain pine beetle
ISBN : MINN:31951D00279652J
Author : Walter E. Cole
Publisher : Unknown
Page : 52 pages
File Size : 48,6 Mb
Release : 1985
Category : Lodgepole pine
ISBN : UIUC:30112104073504
Author : Anonim
Publisher : Unknown
Page : 128 pages
File Size : 41,8 Mb
Release : 1989
Category : Lodgepole pine
ISBN : IND:30000098201399
Author : Pacific Forestry Centre,Mountain Pine Beetle Initiative (Canada)
Publisher : Unknown
Page : 304 pages
File Size : 48,5 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 : Walter E. Cole
Publisher : Unknown
Page : 12 pages
File Size : 41,6 Mb
Release : 1983
Category : Lodgepole pine
ISBN : UIUC:30112104125940
Author : Anonim
Publisher : Unknown
Page : 20 pages
File Size : 43,5 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 : Ervin G. Schuster
Publisher : Unknown
Page : 814 pages
File Size : 41,6 Mb
Release : 1985
Category : Timber
ISBN : STANFORD:36105009851192
Author : Anonim
Publisher : Unknown
Page : 430 pages
File Size : 43,5 Mb
Release : 1991
Category : Blue Mountains (Or. and Wash.)
ISBN : MINN:31951P006225734
