UC Pest Management Guidelines

Herbicide resistance: Glyphosate

pesticide resistance course

Pesticide Resistance Management Online Training  (Take the course)

Herbicide resistance

Read about the types of herbicide resistance, and how weeds can be managed to prevent resistance from developing.

Selection Pressure, Shifting Populations, and Herbicide Resistance and Tolerance (PDF)

Brad Hanson, Albert Fischer, Anil Shrestha, Marie Jasieniuk, Ed Peachey, Rick Boydston, Tim Miller, Kassim Al-Khatib

Effective use of glyphosate

Read about different glyphosate formulations, other ingredients you can add to the mix, better ways to spray, and factors that can make glyphosate more or less effective in the field.

Glyphosate Stewardship: Keeping an Effective Herbicide Effective (PDF)

Tim Miller, Brad Hanson, Ed Peachey, Rick Boydston, Kassim Al-Khatib

Glyphosate in orchards and vineyards

Read about combining glyphosate with longer-lasting herbicides, and about cultivation and management practices that can prevent glyphosate-resistant weeds from emerging in perennial crops.

Preventing and Managing Glyphosate-Resistant Weeds in Orchards and Vineyards (PDF)

Ed Peachey, Rick Boydston, Brad Hanson, Kassim Al-Khatib

Weeds in glyphosate-resistant crops

Read about using glyphosate as part of integrated pest management (IPM) to prevent or manage resistant weeds in glyphosate-resistant crops, especially corn, cotton, alfalfa, canola and sugarbeet.

Managing Glyphosate-Resistant Weeds in Glyphosate-Resistant Crops (PDF)

Kassim Al-Khatib, Brad Hanson, Tim Miller, Ed Peachey, Rick Boydston

About the authors

  • Kassim Al-Khatib: Department of Plant Sciences, University of California, Davis; Director, UC Statewide Integrated Pest Management Program, Division of Agriculture and Natural Resources
  • Rick Boydston: United States Department of Agriculture—Agricultural Research Service, Prosser, Washington
  • Albert Fischer: Department of Plant Sciences, University of California, Davis
  • Brad Hanson: Department of Plant Sciences, University of California, Davis
  • Marie Jasieniuk: Department of Plant Sciences, University of California, Davis
  • Tim Miller: Mount Vernon Research and Extension Unit, Mount Vernon, Washington
  • Ed Peachey: Department of Horticulture, Oregon State University, Corvallis
  • Anil Shrestha: Plant Science Department, California State University, Fresno

PDF: To display a PDF document, you may need to use a PDF reader.

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2022 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See our Home page, or in the U.S., contact your local Cooperative Extension office for assistance.

Agriculture and Natural Resources, University of California

Accessibility   /IPMPROJECT/glyphosateresistance.html?srcPage=IPMPROJECT%2Fglyphosateresistance.html revised: February 16, 2022. Contact webmaster.