Marking forest insects: evaluation of two systems for the systemic introduction of rubidium into Douglas-fir trees

1988 ◽  
Vol 18 (1) ◽  
pp. 19-23 ◽  
Author(s):  
J.A. McLean ◽  
J. Tuytel
Keyword(s):  
British Columbia ◽  
Bark Beetles ◽  
Douglas Fir ◽  
Phloem Tissue ◽  
Double Ring ◽  
University Of British Columbia ◽  
Forest Insects ◽  
Single Ring ◽  
Two Systems ◽  
The University

Mauget® and Medicap® systems were evaluated for the systemic introduction of RbCl into Douglas-fir trees in the University of British Columbia Research Forest, Maple Ridge, B.C. Single, double, and triple rings of devices were placed on trees and Rb levels in foliage were monitored every 2 weeks for 8 weeks. At 8 weeks, trees were felled and phloem and sapwood samples were collected. Wounding associated with the injection devices was evaluated. Triple ring Mauget® injectors gave best results with more than 1890 ppm Rb in leader foliage. Rb levels were evenly distributed by height and aspect throughout the study trees. Highest levels of Rb were found in phloem tissue and these were often 3 times those in adjacent sapwood. Greater wounding, measured by failure to lay down current year springwood, was associated with the Medicap® implants. Some of this was probably caused by our failure to fully insert and thereby seal the implants properly in the tree, and a second factor may have been Rb toxicity as the capsule and RbCl crystals dissolved. A single ring of Mauget® injectors and a double ring of Medicaps® resulted in foliar Rb concentrations high enough for labelling of defoliating insects. High phloem levels of Rb suggest that bark beetles feeding on these trees would also be well labelled.

ATTACK BY GNATHOTRICHUS SULCATUS (COLEOPTERA: SCOLYTIDAE) ON STUMPS AND FELLED TREES BAITED WITH SULCATOL AND ETHANOL

1977 ◽  
Vol 109 (5) ◽  
pp. 675-686 ◽  
Author(s):  
J. A. McLean ◽  
J. H. Borden
Keyword(s):  
Bark Beetles ◽  
Douglas Fir ◽  
Western Hemlock ◽  
Systemic Insecticide ◽  
Dendroctonus Pseudotsugae ◽  
University Of British Columbia ◽  
Steady Decrease ◽  
Population Aggregation ◽  
The University

AbstractEthanol and sulcatol (6-methyl-5-hepten-2-ol), primary attractant and population aggregation pheromone, respectively, for Gnathotrichus sulcatus, were deployed alone or in combination on stumps and felled trees in the University of British Columbia Research Forest, Maple Ridge, B.C. On 18 April 1974, four Douglas-fir trees were felled at each of three locations, and four western hemlock trees were felled at each of three other locations. Felled trees and their respective stumps were baited on 26 April. Attacks by G. sulcatus and bark beetles were recorded at weekly intervals until 25 October. G. sulcatus attacks increased rapidly, reaching a maximum in June and July, followed by a steady decrease to October. Attacks by Dendroctonus pseudotsugae, Pseudohylesinus nebulosus, and P. tsugae showed characteristic seasonal trends, but were not correlated to any of the treatments. Over half the G. sulcatus attacks were on stumps, in which attack densities reached 683.5/m2. The greatest numbers of attacks were on stumps and logs baited with sulcatol or sulcatol plus ethanol. There was a significant interaction between sulcatol and ethanol on Douglas-fir but not on western hemlock. Significantly more G. sulcatus attacked ethanol-baited western hemlock stumps and logs than unbaited controls. However, there was no difference between the level of attack on ethanol-baited Douglas-fir and the controls. The role of ethanol is hypothesized to be more of a boring stimulant than a major attractant. Stumps baited with sulcatol and then treated with ethanolic solutions of systemic insecticide could be used to trap and kill field populations, thus reducing numbers of G. sulcatus being transported to log-booming grounds, dryland sorting areas, and sawmills.

scholarly journals THE RELATIVE EFFICIENCY OF THREE HARE-REPELLENTS IN PROTECTING DOUGLAS-FIR SEEDLINGS

1961 ◽  
Vol 37 (1) ◽  
pp. 22-28 ◽  
Author(s):  
J. Walters ◽  
J. Soos
Keyword(s):  
British Columbia ◽  
Relative Efficiency ◽  
Douglas Fir ◽  
University Of British Columbia ◽  
The University ◽  
Extensive Damage

Damage to plantations by animals is often serious. In the Douglas-fir region, damage by hares is particularly severe. Following extensive damage to Douglas-fir plantations on the University of British Columbia Research Forest, Haney, B.C., by varying hares, three repellents were tested. This paper describes the nature of the damage and assesses the relative efficiency of repellents tested in terms of the protection afforded to treated seedlings.

Critical thinking or common sense?

2016 ◽  
Vol 179 (7) ◽  
pp. i-ii
Author(s):  
Vicki Adams
Keyword(s):  
British Columbia ◽  
Critical Thinking ◽  
Common Sense ◽  
Animal Science ◽  
University Of British Columbia ◽  
The University

Vicki Adams grew up in Vancouver, Canada, and graduated with a degree in animal science from the University of British Columbia before being accepted into vet school in Saskatchewan. Her animal science background has given her the population perspective that is so important in epidemiology and she now runs her own consulting company, Vet Epi

A nursing model in action: the University of British Columbia experience

1993 ◽  
Vol 18 (8) ◽  
pp. 1259-1266
Author(s):  
Sally Thorne ◽  
Carol Jillings ◽  
Donelda Ellis ◽  
JoAnn Perry
Keyword(s):  
British Columbia ◽  
University Of British Columbia ◽  
The University

Advancing campus and community sustainability: strategic alliances in action

2014 ◽  
Vol 15 (2) ◽  
pp. 157-168 ◽  
Author(s):  
Leanne Bilodeau ◽  
Jackie Podger ◽  
Alaa Abd-El-Aziz
Keyword(s):  
Higher Education ◽  
British Columbia ◽  
Community Development ◽  
Lessons Learned ◽  
Content Type ◽  
Sustainable Community Development ◽  
University Of British Columbia ◽  
Societal Needs ◽  
Sustainability Initiatives ◽  
The University

Purpose – Universities can provide a leadership role to develop and mobilize knowledge to meet societal needs. In fulfilling this mission, universities can also serve as agents of sustainable development on campus and in communities they serve. The purpose of this article is to describe the drivers that have advanced the University of British Columbia Okanagan campus' operational and academic sustainability objectives; the initiatives and partnerships developed on campus and in the community in response to these drivers; and the outcomes and lessons learned. Design/methodology/approach – This article summarizes the experience of the University of British Columbia Okanagan campus in leveraging key drivers to develop sustainability initiatives and partnerships for greater operational efficiencies, cost savings, environmental stewardship and applied research. The university's leadership commitment to sustainability, economic opportunities and provincial legislative requirements are among the drivers discussed. This paper also provides an innovative partnership framework to support sustainable community development. Findings – Drivers of sustainability in higher education can contribute to the development of sustainability initiatives and partnerships that benefit institutions and communities and achieve operational and academic sustainability mandates. Practical implications – This article provides information that can be applied by institutions of higher education to advance sustainability within the context of current economic conditions and societal needs. Originality/value – The experience of the campus and the partnership framework presented in this paper is original. The framework provides a mechanism to engage students, faculty and the community in sustainable community development research. Key insights from multiple perspectives and lessons learned are shared.

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