Allozyme and Morphological Differentiation of Mountain Pine Beetles Dendroctonus ponderosae Hopkins (Coleoptera: scolytidae) Associated with Host Tree

Evolution ◽  
1986 ◽  
Vol 40 (2) ◽  
pp. 290 ◽  
Author(s):  
Kareen B. Sturgeon ◽  
Jeffry B. Mitton

1987 ◽  
Vol 13 (6) ◽  
pp. 1455-1480 ◽  
Author(s):  
H. D. Pierce ◽  
J. E. Conn ◽  
A. C. Oehlschlager ◽  
J. H. Borden




2008 ◽  
Vol 38 (8) ◽  
pp. 2313-2327 ◽  
Author(s):  
Peter L. Jackson ◽  
Dennis Straussfogel ◽  
B. Staffan Lindgren ◽  
Selina Mitchell ◽  
Brendan Murphy

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.



1989 ◽  
Vol 15 (7) ◽  
pp. 2089-2099 ◽  
Author(s):  
Armand T. Whitehead ◽  
T. del Scott ◽  
Richard F. Schmitz ◽  
Kenji Mori


2016 ◽  
Vol 160 (2) ◽  
pp. 195-199 ◽  
Author(s):  
Derek W. Rosenberger ◽  
Robert C. Venette ◽  
Brian H. Aukema


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


2012 ◽  
Vol 144 (3) ◽  
pp. 467-477 ◽  
Author(s):  
M. Graf ◽  
M.L. Reid ◽  
B.H. Aukema ◽  
B.S. Lindgren

AbstractHost tree diameter is considered an important predictor of the population dynamics of the mountain pine beetle,Dendroctonus ponderosaeHopkins (Coleoptera: Curculionidae: Scolytinae), but the relationship between host tree diameter and beetle traits is unclear. The primary objective of this study was to determine how the quality of individual mountain pine beetles, measured as body size (pronotum width) and lipid content, varied with the diameter of lodgepole pine trees,Pinus contortavar.latifoliaEngelmann (Pinaceae). Naturally attacked trees, ranging in diameter from 10 to 35 cm, were selected from stands near Prince George, British Columbia, Canada. Colonisation density and pupal density generally increased with tree diameter, but the number of pupal chambers per gallery start remained constant. Tree diameter positively affected beetle body size, which in turn was positively correlated with absolute lipid content in both sexes and relative lipid content in males. However, tree diameter did not directly predict absolute lipid content, and relative lipid content decreased with tree diameter in males. Larger beetles emerged earlier in the emergence period with relative lipid content remaining constant throughout emergence. All relationships had considerable unexplained variation. Thus, the use of tree diameter or emergence time as predictors of population dynamics of mountain pine beetles should be done with caution.



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