Toxicity of Monoterpene Structure, Diversity and Concentration to Mountain Pine Beetles, Dendroctonus ponderosae: Beetle Traits Matter More

2017 ◽  
Vol 43 (4) ◽  
pp. 351-361 ◽  
Author(s):  
Mary L. Reid ◽  
Jagdeep K. Sekhon ◽  
Lanielle M. LaFramboise
Keyword(s):  
Dendroctonus Ponderosae ◽  
Mountain Pine Beetles ◽  
Mountain Pine ◽  
Pine Beetles ◽  
Structure Diversity

Radar observation and aerial capture of mountain pine beetle, Dendroctonus ponderosae Hopk. (Coleoptera: Scolytidae) in flight above the forest canopy

2008 ◽  
Vol 38 (8) ◽  
pp. 2313-2327 ◽  
Author(s):  
Peter L. Jackson ◽  
Dennis Straussfogel ◽  
B. Staffan Lindgren ◽  
Selina Mitchell ◽  
Brendan Murphy
Keyword(s):  
Mountain Pine Beetle ◽  
Forest Canopy ◽  
Dendroctonus Ponderosae ◽  
Weather Radar ◽  
Mountain Pine Beetles ◽  
Emergence Period ◽  
Transport Distance ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Pine Beetles

An outbreak of the mountain pine beetle ( Dendroctonus ponderosae Hopk.) in central British Columbia, Canada, has reached an unprecedented size and intensity and has been spreading. The 2005 emergence and subsequent flight of mountain pine beetle was studied using direct observation of emergence, weather radar imagery, and aerial capture. To verify that the daytime, clear-air radar returns seen during this period were indeed generated by airborne mountain pine beetles, aerial sampling in the area covered by the radar was performed using a drogue capture net towed by a single-engine light aircraft. Results verify that airborne mountain pine beetles are being detected by the weather radar and that, during the emergence period, significant numbers of mountain pine beetles can be found at altitudes up to more than 800 m above the forest canopy. An estimate of transport distance indicates that mountain pine beetles in flight above the forest canopy may move 30–110 km·day–1. An estimate of the instantaneous density of mountain pine beetles in flight above the canopy on flight days in 2005 indicate a mean (maximum) density of 4950 (18 600) beetles·ha–1.

Electroantennograms by mountain pine beetles,Dendroctonus ponderosae Hopkins, exposed to selected chiral semiochemicals

1989 ◽  
Vol 15 (7) ◽  
pp. 2089-2099 ◽  
Author(s):  
Armand T. Whitehead ◽  
T. del Scott ◽  
Richard F. Schmitz ◽  
Kenji Mori
Keyword(s):  
Dendroctonus Ponderosae ◽  
Mountain Pine Beetles ◽  
Mountain Pine ◽  
Pine Beetles ◽  
Chiral Semiochemicals

3,7,7-trimethyl-1,3,5-cycloheptatriene in volatiles of female mountain pine beetles,Dendroctonus ponderosae

1992 ◽  
Vol 79 (1) ◽  
pp. 27-28 ◽  
Author(s):  
G. Gries ◽  
J. H. Borden ◽  
H. D. Pierce ◽  
B. D. Johnston ◽  
A. C. Oehlschlager
Keyword(s):  
Dendroctonus Ponderosae ◽  
Mountain Pine Beetles ◽  
Mountain Pine ◽  
Pine Beetles

PRIMARY ATTRACTION OF MOUNTAIN PINE BEETLE, DENDROCTONUS PONDEROSAE HOPK. (COLEOPTERA: SCOLYTIDAE), TO BOLTS OF LODGEPOLE PINE

1991 ◽  
Vol 123 (2) ◽  
pp. 299-304 ◽  
Author(s):  
Henry A. Moeck ◽  
Clarence S. Simmons
Keyword(s):  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Dendroctonus Ponderosae ◽  
Field Tests ◽  
Mountain Pine Beetles ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Primary Attraction ◽  
Pine Beetles ◽  
Empty Control

AbstractThree field tests were conducted in which fresh lodgepole pine (Pinus contorta Douglas var. latifolia Engl.) material, namely bolts with and without bark, bark only, and freshly tapped resin, were placed in beetle-excluding “greenhouse” cages; empty cages served as controls. Two “window” flight traps per cage, at right angles to each other, caught mountain pine beetles (Dendroctonus ponderosae Hopkins) arriving at the cages. Significantly more mountain pine beetles were trapped at cages baited with bolts and wood only than at empty control cages. Primary attraction in the mountain pine beetle is thus established, in the absence of pheromones and normal visual cues (tree stem silhouette). More beetles were trapped at cages baited with bark only and with resin than at empty control cages, but differences were not significant at p = 0.05. The sex ratio of trapped beetles (4.83 females: 1 male) was more than twice as high as the reported sex ratios of free-flying and emerging beetles.

scholarly journals Within-Stand Distribution of Tree Mortality Caused by Mountain Pine Beetle, Dendroctonus ponderosae Hopkins

Insects ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 112 ◽  
Author(s):  
José F. Negrón
Keyword(s):  
Ponderosa Pine ◽  
Mountain Pine Beetle ◽  
Tree Mortality ◽  
Dendroctonus Ponderosae ◽  
Small Scale ◽  
Mountain Pine Beetles ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Pine Beetles ◽  
Stand Conditions

The mountain pine beetle (MPB) (Dendroctonus ponderosae) is a bark beetle that attacks and kills ponderosa pine (Pinus ponderosa), among other pine species throughout the western conifer forests of the United States and Canada, particularly in dense stands comprising large trees. There is information on the stand conditions that the insect prefers. However, there is a paucity of information on how small-scale variation in stand conditions influences the distribution of tree mortality within a stand. I examined the small-scale distribution of ponderosa pine basal area pre- and post a mountain pine beetle infestation, and used geostatistical modeling to relate the spatial distribution of the host to subsequent MPB-caused tree mortality. Results indicated increased mortality in the denser parts of the stand. Previous land management has changed historically open low-elevation ponderosa pine stands with aggregated tree distribution into dense stands that are susceptible to mountain pine beetles and intense fires. Current restoration efforts are aimed at reducing tree density and leaving clumps of trees, which are more similar to historical conditions. The residual clumps, however, may be susceptible to mountain pine beetle populations. Land managers will want to be cognizant of how mountain pine beetles will respond to restoration treatments, so as to prevent and mitigate tree mortality that could negate restoration efforts.

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