Attraction of Mountain Pine Beetles to Small-Diameter Lodgepole Pines Baited with Trans-Verbenol and Alpha-Pinene13

1972 ◽  
Vol 65 (5) ◽  
pp. 1396-1399 ◽  
Author(s):  
Lynn A. Rasmussen
Keyword(s):  
Small Diameter ◽  
Mountain Pine Beetles ◽  
Mountain Pine ◽  
Lodgepole Pines ◽  
Pine Beetles

Displacement and aggregation of mountain pine beetles, Dendroctonusponderosae (Coleoptera: Scolytidae), in response to their antiaggregation and aggregation pheromones

1993 ◽  
Vol 23 (2) ◽  
pp. 286-290 ◽  
Author(s):  
B.S. Lindgren ◽  
J.H. Borden
Keyword(s):  
Aggregation Pheromones ◽  
Mountain Pine Beetles ◽  
Mountain Pine ◽  
Lodgepole Pines ◽  
Pine Beetles ◽  
Release Devices

Deployment of verbenone release devices at 10-m centres significantly reduced the percent of available lodgepole pines (Pinuscontorta Dougl. var. latifolia Engelm.) that were mass attacked by mountain pine beetles (Dendroctonusponderosae Hopkins) in 50 × 150 m subplots flanked on each side by identical subplots, regardless of whether the flanking plots were baited with tree baits or left untreated. Verbenone treatment also increased the percent of unsuccessful attacks (<31.25 attacks/m2) in the central subplot compared with when the central subplot was left untreated. Tree baits, composed of trans-verbenol, exo-brevicomin, and myrcene, applied in flanking subplots did not affect significantly the percent of trees mass attacked nor the attack density. However, assuming a 2:1 expected ratio of attacks in the two flanking subplots over the central subplot, χ2-tests indicated that the attack distribution was consistently altered only when both verbenone and aggregation pheromones were applied. This study suggests that a "push–pull" tactic using aggregation and antiaggregation pheromones may be feasible for managing this destructive pest.

Species, elevation, and diameter affect whitebark pine and lodgepole pine stored resources in the sapwood and phloem: implications for bark beetle outbreaks

2014 ◽  
Vol 44 (11) ◽  
pp. 1312-1319 ◽  
Author(s):  
Eleanor C. Lahr ◽  
Anna Sala
Keyword(s):  
Nutritional Quality ◽  
Pinus Contorta ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Large Diameter ◽  
Small Diameter ◽  
Whitebark Pine ◽  
Mountain Pine ◽  
Pine Trees ◽  
Lodgepole Pines

Stored resources in trees reflect physiological and environmental variables and affect life history traits, including growth, reproduction, resistance to abiotic stress, and defense. However, less attention has been paid to the fact that stored resources also determine tissue nutritional quality and may have direct consequences for the success of herbivores and pathogens. Here, we investigated whether stored resources differed between two hosts of the mountain pine beetle (Dendroctonus ponderosae Hopkins, 1902): lodgepole pine (Pinus contorta Douglas ex. Loudon), a common host, and whitebark pine (Pinus albicaulis Engelmann), a more naïve host that grows at higher altitudes. Phloem and sapwood were sampled in small- and large-diameter trees at two elevations, and nitrogen, phosphorus, nonstructural carbohydrates, and lipids were measured. We found that concentrations of stored resources increased with elevation and tree diameter for both species and that whitebark pine had thicker phloem than lodgepole pine. Overall, stored resources were higher in whitebark pine such that small-diameter whitebark pine trees often had resource concentrations higher than large-diameter lodgepole pines. These results suggest that whitebark pine is of higher nutritional quality than lodgepole pine, which could have implications for the current expansion of mountain pine beetles into higher altitude and latitude forests in response to climate warming.

Mathematical Elements of Attack Risk Analysis for Mountain Pine Beetles

2000 ◽  
Vol 204 (4) ◽  
pp. 601-620 ◽  
Author(s):  
JAMES POWELL ◽  
BRUCE KENNEDY ◽  
PETER WHITE ◽  
BARBARA BENTZ ◽  
JESSE LOGAN ◽  
...  
Keyword(s):  
Risk Analysis ◽  
Mountain Pine Beetles ◽  
Mountain Pine ◽  
Pine Beetles

THE RELATIONSHIP BETWEEN DENSITY OF EMERGED DENDROCTONUS PONDEROSAE (COLEOPTERA: SCOLYTIDAE) AND DENSITY OF EXIT HOLES IN LODGEPOLE PINE

1985 ◽  
Vol 117 (3) ◽  
pp. 267-275 ◽  
Author(s):  
L. Safranyik ◽  
D.A. Linton
Keyword(s):  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Latex Paint ◽  
Mountain Pine Beetles ◽  
Emergence Period ◽  
South Central ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Pine Beetles ◽  
The Relationship

AbstractThe relationship between the density of insect holes in the bark (X1) and the density of emerged mountain pine beetles (Y) was investigated in naturally infested lodgepole pine in south-central British Columbia. The density of exit and ventilation holes (Ho) that were present in the bark prior to emergence by mountain pine beetle averaged 10% of all holes present following the emergence period. There was a weak but significant inverse relationship between Ho and both phloem thickness and density of emerged mountain pine beetles. Painting the bark with light-color latex paint did not affect survival or the temporal pattern of emergence by mountain pine beetle but ensured identification and greatly enhanced counting of fresh exit holes. Of the several regression models investigated, the relation between Y and both X1 and X2 (= X1 – Ho) was best fitted by a log-log linear model. A method is suggested for setting limits on the size of exit holes cut by mountain pine beetle in order to exclude from X2 much of the variation caused by exit holes cut by associated insects. A simple mathematical model was developed of the relationship between mean density of exit holes and the density of emerged mountain pine beetles.

Sign in / Sign up

Export Citation Format

Share Document