Response of mountain pine beetle,Dendroctonus ponderosae Hopkins, and pine engraver,Ips pint (SAY), to ipsdienol in southwestern British Columbia

1988 ◽  
Vol 14 (1) ◽  
pp. 277-293 ◽  
Author(s):  
D. W. A. Hunt ◽  
J. H. Borden
Keyword(s):  
British Columbia ◽  
Mountain Pine Beetle ◽  
Dendroctonus Ponderosae ◽  
Pine Engraver ◽  
Mountain Pine ◽  
Pine Beetle

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.

Synomones of two sympatric species deter attack by the pine engraver, Ipspini (Coleoptera: Scolytidae)

1992 ◽  
Vol 22 (3) ◽  
pp. 381-387 ◽  
Author(s):  
J.H. Borden ◽  
D.R. Devlin ◽  
D.R. Miller
Keyword(s):  
British Columbia ◽  
Mountain Pine Beetle ◽  
Sympatric Species ◽  
Pine Engraver ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Standing Trees ◽  
Release Devices ◽  
Operational Potential

The capture of pine engravers, Ipspini (Say), in ipdienol-baited, multiple-funnel traps in British Columbia was significantly reduced when devices releasing ipsenol or verbenone were placed in the traps. These results suggest that ipsenol and verbenone are synomones released by Ipslatidens (LeC.) and the mountain pine beetle, Dendroctonusponderosae Hopk., respectively. When verbenone and ipsenol were released together from five stations 2 m apart on felled trees, at 50 and 1.5 mg per day per tree, respectively, there was a 66.7% reduction in the number of logs attacked and a 98.8% reduction in attack density. The same treatment caused a 74.1% reduction in attack density on standing trees surrounded by a 4 × 4 grid of 16 release devices at 5- m centres. The antiaggregant composition of verbenone plus ipsenol has considerable operational potential for use in precommercial thinnings and in areas where standing pines are of high value; e.g., in rural subdivisions, shelterbelts, and recreational forests.

UNCERTAIN FATE OF SPOT INFESTATIONS OF THE MOUNTAIN PINE BEETLE, DENDROCTONUS PONDEROSAE HOPKINS

1993 ◽  
Vol 125 (1) ◽  
pp. 167-169 ◽  
Author(s):  
John H. Borden
Keyword(s):  
British Columbia ◽  
Pinus Contorta ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Dendroctonus Ponderosae ◽  
Single Tree ◽  
Mountain Pine ◽  
Small Spot ◽  
Pine Beetle

Large infestations of the mountain pine beetle, Dendroctonus ponderosae Hopkins (Coleoptera: Scolytidae), reportedly arise from small, spot infestations that expand, multiply, and eventually coalesce (Safranyik et al. 1974). If these spot infestations can be located and eradicated, the development of outbreaks may be delayed, or even precluded. The principal means of eradication of such spots in forests of lodgepole pine, Pinus contorta var. latifolia Engelmann, in British Columbia is single tree disposal (B.C. Ministry of Forests 1987). This may be accomplished by treating with an arsenical herbicide within 3–4 weeks after attack, cutting, bucking, piling, and burning trees before brood emergence, or extraction and processing of brood trees before emergence.

Sign in / Sign up

Export Citation Format

Share Document