› › Bark Beetle Risk In Mature Ponderosa Pine Forests In Western Montana




Distribution of Bark Beetle Attacks on Ponderosa Pine Trees in Montana

Author : Philip Cornwell Johnson

Publisher :

Page : 8 pages

File Size : 49,58 MB

Release : 1967

Category : Bark beetles

ISBN :

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Book Description

The boles of 71 mature ponderosa pine trees killed by Dendroctonus brevicomis LeConte (Coleoptera: Scolytidae) were analyzed to determine the distribution of the attacks by endemic populations of this bark beetle and those of several phloem -feeding associates. The longitudinal -circumferential distribution of the attacks fitted dia- grammatically into four distinguishable bole infestation patterns. The characteristics of the patterns and similarities with comparable ‍?attacks of D. brevicomis in northeastern California are discussed.







Great Basin Station

Author : Bland Z. Richardson

Publisher :

Page : 318 pages

File Size : 25,1 MB

Release : 1971

Category : Bark beetles

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Umatilla National Forest

Author : United States. Forest Service. Pacific Northwest Region

Publisher :

Page : 280 pages

File Size : 20,17 MB

Release : 1979

Category : Environmental impact statements

ISBN :

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Book Description

This environmental statement describes four alternatives representing different intensity levels of timber management which could be implemented by a new 10-year Timber Resource Plan on 886,141 acres of the Umatilla National Forest. The statement discusses the estimated effects of implementing each of the alternatives. Alternative III (Intensive Management Alternative) has been identified as the Forest Service alternative. The rationale for this identification is shown.