scholarly journals Population Densities and Tree Diameter Effects Associated With Verbenone Treatments to Reduce Mountain Pine Beetle-Caused Mortality of Lodgepole Pine

2013 ◽  
Vol 106 (1) ◽  
pp. 221-228 ◽  
Author(s):  
R. A. Progar ◽  
D. C. Blackford ◽  
D. R. Cluck ◽  
S. Costello ◽  
L. B. Dunning ◽  
...  
Keyword(s):  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Population Densities ◽  
Tree Diameter ◽  
Mountain Pine ◽  
Pine Beetle

scholarly journals Biological Aspects of Mountain Pine Beetle in Lodgepole Pine Stands of Different Densities in Colorado, USA

Forests ◽  
2018 ◽  
Vol 10 (1) ◽  
pp. 18 ◽  
Author(s):  
José Negrón
Keyword(s):  
Mountain Pine Beetle ◽  
Tree Mortality ◽  
Lodgepole Pine ◽  
Tree Size ◽  
Individual Tree ◽  
Tree Diameter ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Similarities And Differences ◽  
Pine Stands

Research Highlights: The biology of mountain pine beetle (MPB), Dendroctonus ponderosae Hopkins, in Colorado’s lodgepole pine forests exhibits similarities and differences to other parts of its range. Brood emergence was not influenced by stand density nor related to tree diameter. The probability of individual tree attack is influenced by stocking and tree size. Findings have implications for understanding MPB as a disturbance agent and for developing management strategies. Background and Objectives: MPB causes extensive tree mortality of lodgepole pine, Pinus contorta Douglas ex Loudon, across the western US and Canada and is probably the most studied bark beetle in North America. However, most of the current knowledge on the biology and ecology of MPB in lodgepole pine comes from the Intermountain Region of the US and western Canada. Little information is available from Colorado. This is the first study addressing effects of stand stocking levels on the biology of MPB and quantifying phloem consumption. In addition, although data are available on the conditions that foster stand infestation, this is the first study estimating the probability of individual tree attack among stands of known different stocking. Materials and Methods: Studies were conducted in managed lodgepole pine stands in Colorado. Unbaited traps were used to monitor MPB flight across stands of different densities. Cages were used to monitor emergence and bark samples to determine attack densities, and phloem consumption in trees growing under different stocking. Beetle collections were used to determine emergence across the growing season. Tree mortality data from plots of different densities were used to examine the probability of individual tree infestation. Results: More beetles were caught flying through higher density stands. More attacks were observed in lower stocking stands but there were no differences in the number of insects emerging nor phloem consumption. There was no relationship between tree size and beetle emergence. Peak flight occurred in early to mid-August and only one peak of beetle emergence occurred. The probability of tree attack was influenced by stand stocking and tree diameter. Conclusions: In general, aspects of the biology of MPB in Colorado exhibit similarities and differences with other regions. The data suggest the need to more closely examine how MPB functions in stands of different stocking and how the distribution of tree sizes influence the probability of infestation and extent of mortality in stands. Biological characteristics of MPB in Colorado need further examination, particularly as climate change continues to manifest. Baseline information will be critical to refine management approaches, and extend the understanding of how MPB contributes to shape forest composition and structure in Colorado.

ESTIMATING ATTACK AND BROOD TOTALS AND DENSITIES OF THE MOUNTAIN PINE BEETLE IN INDIVIDUAL LODGEPOLE PINE TREES

1988 ◽  
Vol 120 (4) ◽  
pp. 323-331 ◽  
Author(s):  
L. Safranyik
Keyword(s):  
Surface Area ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Tree Height ◽  
Maximum Height ◽  
Tree Diameter ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Pine Trees ◽  
Variance Estimates

AbstractA method was developed for estimating attack and brood totals of the mountain pine beetle in part or all of the infested bole of individual lodgepole pine trees. The method requires measurement of tree height, tree diameter at 1.37 m, and maximum height of attack, and tallying of brood and attacks on paired 20 cm by 30 cm samples centered at 1.22 m on the bole. Attack and brood totals are estimated in two ways: (1) as a product of the variables (a) total bole surface area, (b) proportion of bole surface area infested, and (c) mean attack/brood density; and (2) regression on the combined variables of tree diameter, infested height, and attack/brood density at 1.22 m on the bole. An approach to developing variance estimates for brood and attack totals is discussed.

Forest structure altered by mountain pine beetle outbreaks affects subsequent attack in a Wyoming lodgepole pine forest, USA

2011 ◽  
Vol 41 (12) ◽  
pp. 2403-2412 ◽  
Author(s):  
Daniel M. Kashian ◽  
Rebecca M. Jackson ◽  
Heather D. Lyons
Keyword(s):  
Pinus Contorta ◽  
Mountain Pine Beetle ◽  
Stand Structure ◽  
Lodgepole Pine ◽  
Climate Change Scenarios ◽  
Cone Production ◽  
Mountain Pine ◽  
Large Trees ◽  
Pine Beetle ◽  
The 1960S

Extensive outbreaks of the mountain pine beetle ( Dendroctonus ponderosae Hopkins) will alter the structure of many stands that will likely be attacked again before experiencing a stand-replacing fire. We examined a stand of lodgepole pine ( Pinus contorta var. latifolia Engelm. ex S. Watson) in Grand Teton National Park currently experiencing a moderate-level outbreak and previously attacked by mountain pine beetle in the 1960s. Consistent with published studies, tree diameter was the main predictor of beetle attack on a given tree, large trees were preferentially attacked, and tree vigor, age, and cone production were unimportant variables for beetle attack at epidemic levels. Small trees killed in the stand were killed based mainly on their proximity to large trees and were likely spatially aggregated with large trees as a result of the previous outbreak. We concluded that the driving factors of beetle attack and their spatial patterns are consistent across outbreak severities but that stand structure altered by the previous outbreak had implications for the current outbreaks in the same location. This study should catalyze additional research that examines how beetle-altered stand structure affects future outbreaks — an important priority for predicting their impacts under climate change scenarios that project increases in outbreak frequency and extent.

The bioconversion of mountain pine beetle-killed lodgepole pine to fuel ethanol using the organosolv process

2008 ◽  
Vol 101 (1) ◽  
pp. 39-48 ◽  
Author(s):  
Xuejun Pan ◽  
Dan Xie ◽  
Richard W. Yu ◽  
Jack N. Saddler
Keyword(s):  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Fuel Ethanol ◽  
Mountain Pine ◽  
Pine Beetle

scholarly journals Resilience of Ponderosa and Lodgepole Pine Forests to Mountain Pine Beetle Disturbance and Limited Regeneration

2015 ◽  
Vol 61 (4) ◽  
pp. 689-702 ◽  
Author(s):  
Jennifer S. Briggs ◽  
Todd J. Hawbaker ◽  
Don Vandendriesche
Keyword(s):  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Pine Forests ◽  
Mountain Pine ◽  
Pine Beetle

scholarly journals Models to Predict the Moisture Content of Lodgepole Pine Foliage during the Red Stage of Mountain Pine Beetle Attack

2015 ◽  
Vol 61 (1) ◽  
pp. 128-134
Author(s):  
Wesley G. Page ◽  
Michael J. Jenkins ◽  
Martin E. Alexander
Keyword(s):  
Moisture Content ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Mountain Pine ◽  
Pine Beetle
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