RHYTHMIC EMERGENCE PATTERNS OF THE MOUNTAIN PINE BEETLE DENDROCTONUS PONDEROSAE (COLEOPTERA: SCOLYTIDAE)

1970 ◽  
Vol 102 (8) ◽  
pp. 1054-1056 ◽  
Author(s):  
J. A. Watson
Keyword(s):  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Dendroctonus Ponderosae ◽  
Fluctuating Temperature ◽  
Emergence Pattern ◽  
Emergence Patterns ◽  
Pine Beetle ◽  
Emergence Rate ◽  
Higher Temperature ◽  
Rate Of Emergence

AbstractLogs of lodgepole pine (Pinus conforta Dougl. var. latifolia Engelm.) supporting immature Dendroctonus ponderosae Hopkins were maintained under conditions of non-fluctuating temperature and light. The rate of emergence of the adult beetles exhibited a rhythmic, possibly circadian, emergence pattern. When the temperatures fluctuated the emergence rate was always greatest in higher temperature.

OBSERVATIONS ON A TRIAL OF BROADCAST BURNING TO CONTROL AN INFESTATION OF THE MOUNTAIN PINE BEETLE DENDROCTONUS PONDEROSAE

1989 ◽  
Vol 121 (6) ◽  
pp. 521-523 ◽  
Author(s):  
A.J. Stock ◽  
R.A. Gorley
Keyword(s):  
Pinus Contorta ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Dendroctonus Ponderosae ◽  
Management Plan ◽  
Management Program ◽  
Control Measures ◽  
Direct Control ◽  
Mountain Pine ◽  
Pine Beetle

The mountain pine beetle, Dendroctonus ponderosae Hopk., causes extensive mortality of lodgepole pine, Pinus contorta var. latifolia Engelm., throughout western North America (Van Sickle 1982). The Prince Rupert Forest Region, in the northwest of British Columbia, initiated an aggressive beetle management program in 1981. Logging of infested stands, and winter felling and burning of individual infested trees are the most common direct control techniques.The “Bristol Lake” infestation developed in the Bulkley Forest District, approximately 55 km northwest of Smithers, B.C., on a steep rocky ridge within the valley of Harold Price Creek. The area contained large volumes of mature lodgepole pine, and control of the infestation was therefore considered critical to the local beetle management plan, but the size (50 ha) and rough topography of the infested area precluded normal direct control measures.

DENDROCTONUS PONDEROSAE (COLEOPTERA: SCOLYTIDAE): PRE-AGGREGATION LANDING AND GALLERY INITIATION ON LODGEPOLE PINE

1980 ◽  
Vol 112 (2) ◽  
pp. 185-191 ◽  
Author(s):  
Barry G. Hynum ◽  
Alan A. Berryman
Keyword(s):  
Pinus Contorta ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Dendroctonus Ponderosae ◽  
Mountain Pine ◽  
Pine Beetle

AbstractLanding rates as monitored by landing traps indicate that the mountain pine beetle, Dendroctonus ponderosae Hopkins, is not attracted to lodgepole pine, Pinus contorta Dougl., prior to the first gallery start. Bark terpene odors and DBH were not correlated with beetle landing rates, with the exception of beta-phellandrene which accounted for a statistically significant 18% of the variation in landing rates. Beetles were unable to distinguish between hosts, dead hosts and nonhosts during landing. The elderberry pith bioassay indicated the presence of a gallery initiation stimulant in the bark.

Pre-logging Baiting with Semiochemicals for the Mountain Pine Beetle, Dendroctonus Ponderosae, in High Hazard Stands of Lodgepole Pine

1986 ◽  
Vol 62 (1) ◽  
pp. 20-23 ◽  
Author(s):  
J. H. Borden ◽  
L. J. Chong ◽  
T. E. Lacey
Keyword(s):  
Pinus Contorta ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Dendroctonus Ponderosae ◽  
Cost Effective ◽  
Additional Advantage ◽  
Mountain Pine ◽  
Massive Influx ◽  
Pine Beetle ◽  
High Hazard

Baiting of trees with attractive semiochemicals prior to logging in three high hazard blocks of lodgepole pine (Pinus contorta var. latifolia Engelm.) was effective in inducing attack by the mountain pine beetle (Dendroctonus ponderosae Hopkins) on baited trees and on surrounding unbaited trees. There was evidence for partial shifting of attack loci, concentration of dispersing beetles and containment of emergent beetles as a result of the baiting program. However, baiting was ineffective when the baits were within the understory canopy, and the baiting program did not cause a massive influx of beetles from infestations 75-200 m away from the baited blocks. Such baiting programs would be cost effective if they avoided the necessity of disposing of two attacked trees/ha outside of the baited blocks. They have the additional advantage of reducing the risk of future beetle attacks by removing beetles and their broods during logging of induced infestations.

HOST EFFECTS ON THE PHENOLOGY, DEVELOPMENT, AND MORTALITY OF FIELD POPULATIONS OF THE MOUNTAIN PINE BEETLE, DENDROCTONUS PONDEROSAE HOPKINS (COLEOPTERA: SCOLYTIDAE)

1989 ◽  
Vol 121 (2) ◽  
pp. 149-157 ◽  
Author(s):  
David W. Langor
Keyword(s):  
Gene Flow ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Dendroctonus Ponderosae ◽  
Regular Monitoring ◽  
Limber Pine ◽  
Pine Beetle ◽  
Declining Populations ◽  
New Hosts ◽  
Better Than

AbstractPhenology, fecundity, development, and mortality were studied for co-occurring, declining populations of Dendroctonus ponderosae Hopkins in limber pine and lodgepole pine at two sites in the Porcupine Hills of southwestern Alberta in 1985–1986. Beetles reared in lodgepole pine emerged and attacked new hosts 7–8 days earlier than those in limber pine in 1985. Beetles were able to utilize over two-thirds of the length of each limber pine bole but only about one-third of the length of each lodgepole pine bole. Also, beetles infesting limber pine had significantly higher fecundity, produced more eggs per centimetre of gallery length, and their progeny developed faster and survived better than beetles infesting lodgepole pine. There was no apparent phenological or other barrier that might inhibit gene flow between D. ponderosae populations in limber pine and lodgepole pine. In the area studied, limber pine was a better host for D. ponderosae reproduction, development, and survival than was lodgepole pine. Thus, beetle populations may be able to increase much more quickly in limber pine, arguing for regular monitoring of these populations.

EMERGENCE OF IPS PINI AND HYLURGOPS POROSUS (COLEOPTERA: SCOLYTIDAE) FROM DUFF AT THE BASE OF LODGEPOLE PINES (PINACEAE) KILLED BY MOUNTAIN PINE BEETLE (COLEOPTERA: SCOLYTIDAE)

1999 ◽  
Vol 131 (6) ◽  
pp. 825-827 ◽  
Author(s):  
L. Safranyik ◽  
D.A. Linton ◽  
T.L. Shore
Keyword(s):  
Pinus Contorta ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Dendroctonus Ponderosae ◽  
Ips Pini ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Lodgepole Pines ◽  
Root Collar

Lodgepole pines, Pinus contorta var. contorta Engelmann, killed by mountain pine beetle, Dendroctonus ponderosae Hopkins, are often subsequently infested by other scolytid species (Safranyik et al. 1996). Ips pini (Say) breeds in the phloem region of the main bole and larger branches in areas not occupied by mountain pine beetle. Adults emerge in the fall and drop to overwinter in the duff near the bases of their brood trees (Safranyik et al. 1996). Hylurgops porosus (LeConte) infests lodgepole pine (Keen 1952; Bright 1976) stumps or severely weakened trees near the root collar and in large roots (Wood 1982). We examined the pattern of emergence of I. pini and H. porosus from the duff around infested trees to describe changes in density over distance from the trees.

scholarly journals The Application of Behaviour-modifying Chemicals to Contain Infestations of the Mountain Pine Beetle, Dendroctonus ponderosae

1983 ◽  
Vol 59 (5) ◽  
pp. 235-239 ◽  
Author(s):  
J. H. Borden ◽  
L. J. Chong ◽  
K. E. G. Pratt ◽  
D. R. Gray
Keyword(s):  
British Columbia ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Dendroctonus Ponderosae ◽  
Salvage Logging ◽  
Mountain Pine ◽  
Experimental Block ◽  
Pine Beetle ◽  
Overall Ratio

Five replicates of paired forest blocks containing lodgepole pine, Pinus contorts var. latifolia Engelm., infested by the mountain pine beetle, Dendroctonus ponderosae Hopkins, were chosen in the spring of 1982 in various interior British Columbia locations. Within the experimental block of each pair, one lodgepole pine every 50 m (4 trees/ha) was baited with the attractive semiochemicals myrcene, trans-verbenol and exo-brevicomin. The baiting program caused the attack in 1982 to be concentrated in and around the baited trees, whereas it was more dispersed in the control blocks. The overall ratio of 1982: 1981 attacked trees was 2.5 in the baited blocks and 1.8 in the controls, suggesting that dispersal of beetles out of the baited blocks was inhibited. Baiting of trees with semiochemicals is recommended to contain infestations within prescribed boundaries when sanitation-salvage logging cannot be completed prior to mid-summer flight of emergent brood beetles.

Early stages of blue-stain fungus invasion of lodgepole pine sapwood following mountain pine beetle attack

1995 ◽  
Vol 73 (1) ◽  
pp. 70-74 ◽  
Author(s):  
Halvor Solheim
Keyword(s):  
Key Words ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Dendroctonus Ponderosae ◽  
Leading Edge ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Blue Stain Fungi ◽  
Blue Stain ◽  
Ophiostoma Montium

Invasion of lodgepole pine sapwood by blue-stain fungi was followed for 7 weeks after infestation by the mountain pine beetle, Dendroctonus ponderosae. During this period all sapwood was heavily stained blue and blue-stain fungi were always isolated close to the front of visible occlusion. Ophiostoma clavigerum and Ophiostoma montium were commonly isolated, both of which are known to be carried in the mycangia of the mountain pine beetle. Ophiostoma montium was most frequently isolated, but when both fungi were present O. clavigerum was always at the leading edge of fungal penetration. On average O. montium trailed 7.3 mm behind O. clavigerum. Other microorganisms were seldom isolated. Key words: lodgepole pine, Dendroctonus ponderosae, fungal succession, blue-stain fungi.

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