Variation in pathogenicity of a mountain pine beetle–associated blue-stain fungus,Grosmannia clavigera, on young lodgepole pine in British Columbia

2008 ◽  
Vol 30 (3) ◽  
pp. 457-466 ◽  
Author(s):  
Alex Plattner ◽  
Jae-Jin Kim ◽  
Scott DiGuistini ◽  
Colette Breuil
Keyword(s):  
British Columbia ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Blue Stain ◽  
Grosmannia Clavigera

Entomocorticium dendroctoni gen. et sp. nov. (Basidiomycotina), a possible nutritional symbiote of the mountain pine beetle in lodgepole pine in British Columbia

1987 ◽  
Vol 65 (1) ◽  
pp. 95-102 ◽  
Author(s):  
H. S. Whitney ◽  
R. J. Bandoni ◽  
F. Oberwinkler
Keyword(s):  
British Columbia ◽  
Bark Beetle ◽  
Pinus Contorta ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Pine Bark ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Blue Stain Fungi ◽  
Blue Stain

A new basidiomycete, Entomocorticium dendroctoni Whitn., Band. & Oberw., gen. et sp. nov., is described and illustrated. This cryptic fungus intermingles with blue stain fungi and produces abundant essentially sessile basidiospores in the galleries and pupal chambers of the mountain pine bark beetle (Dendroctonus ponderosae Hopkins Coleoptera: Scolytidae) in lodgepole pine (Pinus contorta Dougl. var. latifolia Engelm.). The insect apparently disseminates the fungus. Experimentally, young partially insectary reared adult beetles fed E. dendroctoni produced 19% more eggs than beetles fed the blue stain fungi.

scholarly journals MOISTURE CHANGES IN LODGEPOLE PINE BEFORE AND AFTER ATTACK BY THE MOUNTAIN PINE BEETLE

1961 ◽  
Vol 37 (4) ◽  
pp. 368-375 ◽  
Author(s):  
R. W. Reid
Keyword(s):  
Moisture Content ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Dry Weight ◽  
Moisture Loss ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Before And After ◽  
Blue Stain ◽  
One Year

The moisture content of the outer sapwood of non-infested lodgepole pine is normally about 85 to 165 per cent of oven dry weight. In trees that have been infested by the mountain pine beetle for one year, the sapwood moisture content can be as low as 16 per cent. There is a steep moisture gradient from about 160 per cent in the outer sapwood to about 30 per cent in the heart-wood. The moisture content in the centre is slightly higher than in the adjacent wood. In infested trees the sapwood moisture is greatly reduced within a year after the attack but moisture in the heartwood is not altered appreciably. Trees infested early in the season drop to a lower moisture content by fall than trees infested later in the season. In non-infested trees there is a diurnal and a seasonal moisture march; these do not occur in infested trees. The rapid moisture loss in the sapwood of infested trees is associated with blue-stain infection and successful establishment of bark-beetle broods

Reduction of mountain pine beetle (Coleoptera: Scolytidae) attacks by verbenone in lodgepole pine stands in British Columbia

1989 ◽  
Vol 19 (1) ◽  
pp. 65-68 ◽  
Author(s):  
B. S. Lindgren ◽  
J. H. Borden ◽  
G. H. Cushon ◽  
L. J. Chong ◽  
C. J. Higgins
Keyword(s):  
British Columbia ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Management Tool ◽  
Mountain Pine ◽  
Pine Beetle ◽  
The Mean ◽  
Pine Stands ◽  
Release Devices

The effect of the aggregation-inhibiting pheromone verbenone on mountain pine beetle attacks in lodgepole pine stands was assessed by affixing verbenone release devices on trees on a 10 × 10 m grid. In one experiment, aggregation to trees baited with an attractive combination of trans-verbenol, exo-brevicomin, and myrcene was reduced in verbenone-treated blocks compared with control blocks (attractive baits only). The mean number of trees with mass attacks (≥31.3 attacks/m2), mean percentage of available trees mass attacked, and mean total number of trees infested were reduced by 74.3, 66.7, and 58.5%, respectively. The ratio of 1987 attacks to 1986 attacks was reduced from 14.0 to 2.6. In a second experiment, using no attractive baits, verbenone caused similar but nonsignificant reductions. The mean number of trees with mass attacks, mean percentage of available trees mass attacked, and mean total number of trees infested were reduced by 75.2, 53.5, and 62.1%, respectively. The 1987 to 1986 attack ratio was reduced from 13.2 in control blocks to 0.2 in the verbenone-treated blocks, and the percentage of trees that were infested but not mass attacked was significantly increased, from 45.7% in the control blocks to 63.2% in the verbenone-treated blocks. We conclude that verbenone shows promise as a management tool for controlling the mountain pine beetle.

Inoculation of lodgepole pine with four blue-stain fungi associated with mountain pine beetle, monitored by a heat pulse velocity (HPV) instrument

1990 ◽  
Vol 20 (1) ◽  
pp. 31-36 ◽  
Author(s):  
Y. Yamaoka ◽  
R. H. Swanson ◽  
Y. Hiratsuka
Keyword(s):  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Heat Pulse ◽  
Pulse Velocity ◽  
The Other ◽  
Mountain Pine ◽  
Short Period ◽  
Pine Beetle ◽  
Blue Stain Fungi ◽  
Blue Stain

In two separate experiments in the field, healthy 80-year-old lodgepole pine (Pinuscontorta Dougl. var. latifolia Engelm.) were inoculated with four blue-stain fungi that are associated with mountain pine beetle (Dendroctonusponderosae Hopk.) and beetle-attacked trees. Inocula of Ophiostomaclavigerum (Robins.-Jeff. & Davids.) Harrington, O, huntii (Robins.-Jeff.) de Hoog & Scheffer, O. montium (Rumb.) von Arx, and O. minus (Hedge.) H. & P. Sydow were prepared on sawdust media. Inoculum was placed under the bark in two areas (8 × 5 cm each), one above the other, separated by a 15-cm space in which heat pulse velocity (HPV) sensors were installed. HPVs in the inoculated trees were monitored daily for 4 weeks. In sections inoculated with O. clavigerum, HPVs were significantly reduced 10 to 13 days after inoculation in both experiments. Sapwood under the inoculated area was visibly altered and colonized by the fungus. The other three fungi did not significantly reduce HPVs. These results proved the capability of O. clavigerum to colonize functional sapwood and stop sap flow within a short period of time and reconfirmed the importance of this fungus in the mortality of trees attacked by mountain pine beetle.

Virulence of, and interactions among, mountain pine beetle associated blue-stain fungi on two pine species and their hybrids in Alberta

2007 ◽  
Vol 85 (3) ◽  
pp. 316-323 ◽  
Author(s):  
A.V. Rice ◽  
M.N. Thormann ◽  
D.W. Langor
Keyword(s):  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Jack Pine ◽  
Fungal Species ◽  
Lesion Length ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Blue Stain Fungi ◽  
Blue Stain ◽  
Hybrid Pine

Mountain pine beetle (MPB) is the most serious pest of lodgepole pine in western Canada, and it is predicted to spread into boreal jack pine within the next few years. Colonization of host trees by MPB-associated blue-stain fungi appears to be required for successful beetle reproduction. Three species of blue-stain fungi, Grosmannia clavigera (Robinson-Jeffery and Davidson) Zipfel, de Beer, and Wingfield (≡ Ophiostoma clavigerum (Robinson-Jeffery and Davidson) Harrington), Ophiostoma montium (Rumbold) von Arx, and Leptographium longiclavatum Lee, Kim, and Breuil, are associated with MPB in Alberta. In inoculation experiments, all three fungi caused lesions on lodgepole pine, jack pine, and their hybrids. On average, lesions were longer on jack pine and hybrids than on lodgepole pine, suggesting that fungal development will not be a barrier to MPB success in these trees. Differences in lesion length caused by the three fungal species were minimal, with significant differences observed only on hybrid pine and between O. montium and the other fungal treatments. On average, lesions caused by combinations of the three fungi (pair-wise and all together) did not differ significantly in length from those caused by the fungi singly, and none of the fungal species competitively excluded any of the others. These observations suggest that all three species are pathogenic to boreal pines and that the virulence of all three species is comparable.

Rate of increase of blue stained volume in mountain pine beetle killed lodgepole pine in northeastern Oregon, U.S.A.

1979 ◽  
Vol 9 (3) ◽  
pp. 323-326 ◽  
Author(s):  
Robert D. Harvey Jr.
Keyword(s):  
Cross Section ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Rate Of Spread ◽  
Mountain Pine ◽  
Rate Of Increase ◽  
Pine Beetle ◽  
Blue Stain Fungi ◽  
Blue Stain

Recently killed lodgepole pine (Pinuscontorta Dougl.) were examined to determine rate of spread of blue stain fungi introduced by mountain pine beetle (Dendroctonusponderosae Hopk.). Trees were felled, dissected at 2.5-m intervals, and photographed at each cross section to determine area of stain. Rate of spread is so rapid that salvaging mountain pine beetle killed lodgepole pine prior to severe staining is difficult.

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