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, D.J., R. Bourchier, R. De Clerck-Floate, V. Miller, S. Turner, C. Moffat. 2021. 50 years of biological control of invasive spotted knapweed in British Columbia. ISCBC Virtual Forum. 15-17 Feb. 2022.

    2022 - View publication details

  2. Ensing, D.J., R. Bourchier, R. De Clerck-Floate, V. Miller, S. Turner, C. Moffat. 2021. Research on invasive plant species biological control at AAFC’s Summerland RDC. Guest Lecture to U Saskatchewan's Invasive Plants course (Prof: Jon Bennett) 17 Feb. 2022.

    2022 - View publication details

  3. Moffat, C.E., R. Bourchier, R. De Clerck-Floate, P. Mason, D. Ensing. 2021. How do we know biocontrol agents are safe? An overview of past successes and future opportunities for biological control of weeds in British Columbia. I2021 Integrated Vegetation Management Association (IVMA) biennial forum “Everything" in Vegetation Management. Nov 2 - 4, 2021. Invited.

    2021 - View publication details

  4. Ensing, D.J., 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

  5. 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

  6. Moffat, C.E., R. Bourchier, R. De Clerck-Floate, P. Mason, D. Ensing. 2021. Case studies in biocontrol research in British Columbia: Identifying new targets to post-release monitoring. ISCBC Invasive Species Research Conference (virtual), 06-07 October 2021.

    2021 - View publication details

  7. Moffat, C.E., R.S. Bourchier, R.A. De Clerck-Floate, and D.J. Ensing. 2021. New Research on Old Weeds:
    An Update on Biological Control Programs In BC. Thompson Nicola Invasive Plant Management Committee (virtual). 23 February, 2021. Invited.

    2021 - View publication details

  8. 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

  9. 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

  10. 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

  11. 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. Plants, [online] 9(2), http://dx.doi.org/10.3390/plants9020208

    2020 - View publication details

  12. 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

  13. Bagavathiannan M., S. Graham, Z. Ma, J.N. Barney, S. Coutts, A.L. Caicedo, R. De Clerck-Floate, N. West, L. Blank, A. Metcalf, M. Lacoste, C. Moreno, J. Evans, I. Burke and H. Beckie. 2019. Considering weed management as a social dilemma bridges individual and collective interests. Nature Plants 5 (4), 343–351.

    2019 - View publication details

  14. 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. Annals of Applied Biology, [online] 173(1), 16-34. http://dx.doi.org/10.1111/aab.12430

    2018 - View publication details

  15. 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

  16. 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

  17. 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. American Journal of Botany, [online] 102(7), 1145-1159. http://dx.doi.org/10.3732/ajb.1400466

    2015 - View publication details

  18. 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

  19. 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

  20. 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

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