Stereospecific antennal response by red turpentine beetle,Dendroctonus valens to chiral monoterpenes from ponderosa pine resin

1993 ◽  
Vol 19 (10) ◽  
pp. 2193-2202 ◽  
Author(s):  
Peter R. White ◽  
Kenneth R. Hobson
Keyword(s):  
Ponderosa Pine ◽  
Pine Resin ◽  
Dendroctonus Valens ◽  
Antennal Response

Influence of Ponderosa Pine Resin Volatiles on the Response of Dendroctonus ponderosae1 to Synthetic trans -Verbenol 2 , 3

1976 ◽  
Vol 5 (1) ◽  
pp. 171-179 ◽  
Author(s):  
Ronald F. Billings ◽  
Robert I. Gara ◽  
Bjorn F. Hrutfiord
Keyword(s):  
Ponderosa Pine ◽  
Pine Resin

Seasonal fire effects on mixed-conifer forest structure and ponderosa pine resin properties

2006 ◽  
Vol 36 (1) ◽  
pp. 238-254 ◽  
Author(s):  
Daniel DB Perrakis ◽  
James K Agee
Keyword(s):  
Pinus Ponderosa ◽  
Forest Structure ◽  
Ponderosa Pine ◽  
Bark Beetles ◽  
Conifer Forest ◽  
Mixed Conifer ◽  
Pine Resin ◽  
Ponderosa Pine Forests ◽  
Fuel Loads ◽  
Resin Defenses

This study examined the effects of spring and fall restoration burning in an old-growth mixed-conifer – ponderosa pine (Pinus ponderosa Dougl. ex P. & C. Laws.) forest in southern Oregon. Variables measured include fuel loads, forest structure indices, mortality of large ponderosa pines, and pine resin defenses. One year after treatment, reductions in surface fuel loads and changes to forest structure parameters suggested that burning treatments could meet restoration objectives, with fall burns being somewhat more effective than spring burns. However, mortality of pre settlement pines was significantly higher in fall burns than in spring burns, and both were higher than in unburned controls. Bark beetles (Coleoptera: Scolytidae) were important mortality agents within 2 years after burning. Resin defenses (pressure and flow) were variable over the 2 years of postburn study but showed no evidence of decrease in burned trees; rather, resin defenses were significantly higher in burned trees than in controls at several measurement dates. While increased beetle attacks have previously been documented following burning, there has been much less research on resin responses to fire. These findings suggest that current models of beetle–host interactions do not properly explain the effects of prescribed fire in ponderosa pine forests.

Association between Dendroctonus valens and black stain root disease on ponderosa pine in the Sierra Nevada of California

2005 ◽  
Vol 137 (3) ◽  
pp. 367-375 ◽  
Author(s):  
Donald R. Owen ◽  
David L. Wood ◽  
John R. Parmeter
Keyword(s):  
Mortality Rate ◽  
Sierra Nevada ◽  
Pinus Ponderosa ◽  
Ponderosa Pine ◽  
Mountain Pine Beetle ◽  
Root Disease ◽  
Western Pine Beetle ◽  
Dendroctonus Valens ◽  
Pine Beetle ◽  
Colonization Behavior

AbstractThe host-colonization behavior of the red turpentine beetle, Dendroctonus valens LeConte (Coleoptera: Scolytidae), was investigated in stands of ponderosa pine, Pinus ponderosa P. & C. Lawson (Pinaceae), with black stain root disease in the central Sierra Nevada of California. By felling live trees, we found that trees with pitch tubes produced during the initiation of tunneling by D. valens had a significantly higher incidence of black stain root disease, caused by Leptographium wageneri var. ponderosum (Harrington et Cobb), than trees without pitch tubes. Trees with the most D. valens pitch tubes had the greatest likelihood of being diseased. Additionally, observations over a 3-year period revealed that trees with D. valens pitch tubes had a significantly higher mortality rate than trees without pitch tubes. Infection by L. wageneri was confirmed for most of the trees that died, and death typically did not occur without mass attacks by the western pine beetle, D. brevicomis LeConte, and (or) the mountain pine beetle, D. ponderosae Hopkins. Trees with the most D. valens pitch tubes had the highest mortality rate. An experiment was conducted to compare the attraction of D. valens and other insects to wounded-diseased, wounded-symptomless, and unwounded trees. More D. valens, Spondylis upiformis Mannerheim (Coleoptera: Cerambycidae), and Hylastes spp. (Coleoptera: Scolytidae) were attracted to wounded trees than to unwounded trees. Catches of these beetles on wounded-diseased trees were not significantly different from catches on wounded-symptomless trees.

Lick Creek historic photographic series: a century of change in a ponderosa pine forest in western Montana, US

2018 ◽  
Author(s):  
Sharon M. Hood ◽  
Duncan C. Lutes ◽  
Justin S. Crotteau ◽  
Christopher R. Keyes ◽  
Anna Sala ◽  
...  
Keyword(s):  
Ponderosa Pine ◽  
Pine Forest ◽  
Western Montana ◽  
Ponderosa Pine Forest

Vegetation and soil effects from prescribed, wild, and combined fire events along a ponderosa pine and grassland mosaic

2007 ◽  
Author(s):  
Theresa Jain ◽  
Molly Juillerat ◽  
Jonathan Sandquist ◽  
Mike Ford ◽  
Brad Sauer ◽  
...  
Keyword(s):  
Ponderosa Pine ◽  
Soil Effects
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