Prevention and Control Options for Glyphosate-Resistant Kochia (Kochia scoparia)

  • Author / Creator
    Low, Ryan Harvey
  • Glyphosate resistant Kochia scoparia is a growing concern in Canada, and is increasing in incidence. Trials were conducted in naturally occurring glyphosate susceptible kochia populations or in areas seeded with glyphosate susceptible kochia seed. By looking at herbicides with different modes of action that can control kochia as effectively as glyphosate, as well as introducing a new herbicide application window, it may be possible to decrease the occurrence of glyphosate-resistant kochia biotypes from becoming the majority of kochia populations on the Canadian prairies. Fluroxypyr + MCPA ester (a group 4 herbicide), bromoxynil + 2,4D (a combination of group 6 and 4 herbicides), saflufenacil and carfentrazone-ethyl (group 14), pyrasulfotole + bromoxynil (a combination of group 27 and 6 herbicides) were as effective at controlling kochia as glyphosate when applied pre-seeding. It was determined that herbicide effectiveness varies according to location. Introducing a new window of herbicide application in the fall, post-harvest, was not effective at controlling kochia.

  • Subjects / Keywords
  • Graduation date
  • Type of Item
  • Degree
    Master of Science
  • DOI
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
  • Language
  • Institution
    University of Alberta
  • Degree level
  • Department
    • Department of Agricultural, Food, and Nutritional Science
  • Specialization
    • Plant Science
  • Supervisor / co-supervisor and their department(s)
    • Hall, Linda (Department of Agricultural, Food, and Nutritional Science)
  • Examining committee members and their departments
    • Hall, Linda (Department of Agricultural, Food, and Nutritional Science)
    • Beckie, Hugh (Agriculture and Agri-food Canada)
    • Leite, Vagner (Department of Agricultural, Food, and Nutritional Science)
    • Bork, Edward (Department of Agricultural, Food, and Nutritional Science)