Rosemarie De Clerck-Floate, Ph.D.

Image Rosemarie De Clerck-Floate
Research Scientist - Weed Biological Control

Research on:

- Biological control of weeds

- Plant-insect interactions

- Insect and plant ecology

 

Current research and/or projects

  • Effects of soil moisture and nitrogen (climate change) on efficacy of weed biological control

  • Development of release strategies for predictable establishment and impact of weed biocontrol agents

  • Development of methods for biocontrol agent mass-production

  • Assessment of biological control safety and efficacy via studies of insect-plant ecological and evolutionary associations, insect and plant behaviour, insect impact on plant individuals and populations

Research and/or project statements

Biological control is a valuable tool in the mitigation of agricultural and environmental impacts from pest threats such as weeds. When effective, the strategy provides a sustainable, long-term and low-cost solution to pest management, especially in areas where chemical control may be unfeasible for economic and/or environmental reasons (e.g., weed control on native rangelands). Canada is seen as a world leader in the discovery, development and safe use of biological control agents for weeds, and since the AAFC program’s initiation in 1951, has produced several notable successes. Our program partners with regional governments, industry (cattle producers), academia, and international experts (e.g. CABI) in the assessment, release, and knowledge development for new biocontrol agents against emerging weed problems in Canada.

Professional activities / interests

  • Adjunct Professor, University of British Columbia - Okanagan

  • Adjunct Professor, University of Lethbridge

  • President, Entomological Society of Canada (2013)

  • Member, AAFC National Containment, Biosafety and Biosecurity Committee

  • Member, AAFC Biological Control Working Group

  • Student training

  • Science and art collaborations

Education and awards

  • Ph.D. (Botany/Entomology) – Northern Arizona University

  • M.Sc. (Biology) - University of Saskatchewan

  • B.Sc. (Biology) – Laurentian University

  • Federal Government 5-NR Science Award for Leaders in Sustainable Development (with R. Bourchier )for Weed Biocontrol Research 2001

International experience and/or work

  • Scientific Advisor – International weed biological control projects (e.g. toadflax, houndstongue, hawkweeds).

  • Transfer of Work (weed biological control)– CSIRO Brisbane, Australia (2004 – 2005)

Key publications

  1. Ensing, DJ, R Bourchier, R De Clerck-Floate, V Miller, S Turner, C Moffat. 2021. 30 years of biological control of invasive spotted knapweed in British Columbia. ISCBC Invasive Species Research Conference, Virtual, 06-07 October 2021.

    2021 - View publication details

  2. Moffat, C.E., R.S. Bourchier, R.A. De Clerck-Floate, P.G. Mason, and D.J. Ensing. 2021. How do we know biocontrol agents are safe? An overview of the Canadian research and regulatory process for new biocontrol agents. British Columbia Invasive Species Council. Invasives 2021 Conference (virtual). 9 Februrary, 2021.

    2021 - View publication details

  3. Ensing, D.J., R. Bourchier, R. De Clerck-Floate, T.D. Nelson, V. Miller, S. Turner, C.E. Moffat. 2020. Classical biological control leads to long term declines in the rangeland invasive spotted knapweed. Entomological Society of America (virtual), 16-19 November, 2020.

    2020 - View publication details

  4. Ensing, D.J., T.D. Nelson, R. Bourchier, R. De Clerck-Floate, V. Miller, S. Turner, C.E. Moffat. 2020. Contemporary ecology of historical weed biological control programs: Re-evaluating spotted knapweed biocontrol in BC. Entomological Society of British Columbia (virtual), 26-28 October, 2020.

    2020 - View publication details

  5. Andreas, P., Kisiala, A., Neil Emery, R.J., De Clerck-Floate, R., Tooker, J.F., Price, P.W., Miller, D.G., Chen, M.S., Connor, E.F. (2020). Cytokinins are abundant and widespread among insect species, 9(2), http://dx.doi.org/10.3390/plants9020208

    2020 - View publication details

  6. De Clerck-Floate, R. 2019. Weevils from Serbia show promise in yellow toadflax biological control in Canada. Agriculture and Agri-Food Canada, Lethbridge, Alberta, Canada. Catalogue No. A22-631/2019E-PDF, ISBN No.978-0-660-32854-6, AAFC No. 12990E. 4 pp.

    2019 - View publication details

  7. Toševski, I., Sing, S.E., De Clerck-Floate, R., McClay, A., Weaver, D.K., Schwarzländer, M., Krstić, O., Jović, J., Gassmann, A. (2018). Twenty-five years after: post-introduction association of Mecinus janthinus s.l. with invasive host toadflaxes Linaria vulgaris and Linaria dalmatica in North America, 173(1), 16-34. http://dx.doi.org/10.1111/aab.12430

    2018 - View publication details

  8. Mason PG, De Clerck-Floate RA, Gallant B, Gillespie DR, Floate K, Bourchier R, Douglas H, Vincent C, Boivin G (2017) Guide for the Importation and Release of Arthropod Biological Control Agents in Canada. Agriculture and Agri-Food Canada A42-122/2017E.

    2017 - View publication details

  9. Catton, H.A., Lalonde, R.G., and De Clerck-Floate, R.A. (2015). "Nontarget herbivory by a weed biocontrol insect is limited to spillover, reducing the chance of population-level impacts.", Ecological Applications, 25(2), pp. 517-530. doi : 10.1890/14-0250.1

    2015 - View publication details

  10. Moffat, C.E., Ensing, D.J., Gaskin, J.F., De Clerck-Floate, R.A., Pither, J. (2015). Morphology delimits more species than molecular genetic clusters of invasive Pilosella, 102(7), 1145-1159. http://dx.doi.org/10.3732/ajb.1400466

    2015 - View publication details

  11. McClay, A. and De Clerck-Floate, R.A. (2014). "Biological control of yellow toadflax, Linaria vulgaris: First report of apparent impact of the stem-mining weevil, Mecinus janthinus, in Canada.", Northern Rockies Invasive Plant Council Meeting, Spokane, Washington, USA, February 10-13, 2014.

    2014 - View publication details

  12. De Clerck-Floate, R.A. and McClay, A. (2014). "Update on Canadian toadflax studies.", International Toadflax Biological Control Consortium Meeting, Northern Rockies Invasive Plant Council Meeting, Spokane, Washington, USA, February 10-13, 2014.

    2014 - View publication details

  13. De Clerck-Floate, R.A. and Laird, R.A. (2014). "Investigating the role of plant morphology in weed biocontrol.", 62nd Annual Meeting of the Entomological Society of Alberta, Lethbridge, AB, Canada, October 16-18, 2014.

    2014 - View publication details

  14. De Clerck-Floate, R.A. (2014). "A phytocentric focus in weed biological control: Does plant morphology affect insect and plant responses during interaction?", Entomological Society of America Annual Meeting 2014.

    2014 - View publication details

  15. De Clerck-Floate, R.A. (2014). "Update on Canada’s recent research on hawkweeds.", International Hawkweeds Biological Control Consortium Meeting, Northern Rockies Invasive Plant Council Meeting, Spokane, Washington, USA, February 10-13, 2014.

    2014 - View publication details

  16. Littlefield, J., De Clerck-Floate, R.A., Grosskopf-Lachat, G., and Hinz, H.L. (2014). A petition for the field release of the hoverfly Cheilosia urbana (Diptera: Syrphidae) for biological control of alien invasive hawkweeds in North America. (Report)

    2014 - View publication details

  17. Winston, R., Randall, C.B., De Clerck-Floate, R.A., McClay, A., Andreas, J.E., and Schwarzländer, M. (2014). Field Guide for the Biological Control of Weeds in the Northwest., USDA. (Book)

    2014 - View publication details

  18. Catton, H.A., Lalonde, R.G., and De Clerck-Floate, R.A. (2014). "Patterns and impact of herbivery by Mogulones crucifer on its target week, Cynoglossum officinale and the nontarget plant Hackelia micrantha.", Northern Rockies Invasive Plant Council Meeting, Spokane, Washington, USA, February 10-13, 2014.

    2014 - View publication details

  19. De Clerck-Floate, R.A. (2014). Interim Report to BC Ministry of Forests Lands and Natural Resource Operations: Research and Development on a New Biocontrol Agent for Invasive Hawkweeds. (Report)

    2014 - View publication details

  20. De Clerck-Floate, R.A. (2014). "Understanding plant morphology in the successful application of weed biocontrol.", 2014 Joint Annual Meeting of Entomological Society of Saskatchewan and Entomological Society of Canada, Saskatoon SK, Canada, September 28-October 1, 2014.

    2014 - View publication details

Research facility

5403 1st Avenue South
Lethbridge, AB T1J 4B1
Canada

Affiliations

  • Member, Entomological Society of Canada

  • Member, Entomological Society of Alberta

  • Member, Canadian Botanical Association

  • Member, Entomological Society of America

  • Member, Canadian Society of Ecology and Evolution

Language

English