Last winter, I particpated in a series of seven half-day workshops in California, Oregon, and Washington on herbicide-resistant weeds.  These workshops were organized by Kassim Al-Khatib from the Univeristy of California Integrated Pest Management (IPM) Program and had a special focus on glyphosate-resistant weeds in tree and vine crops. In preparation for these workshops, we wrote a series of extension publications that I wanted to share today.  The publications and resulting presentations were prepared by weed scientists from various Universities, Cooperative Extension, and USDA-ARS and included various aspects of herbicide resistance in permanent crops.  Even as somone who thinks about herbicide resistance every day, I found the bulletins and presentations to be tremendously informative.  These included: Selection Pressure, Shifting Populations, and Herbicide Resistance and Tolerance by Brad Hanson, Albert Fischer, Anil Shrestha, Marie Jasieniuk, Ed Peachey, Rick Boydston, Tim Miller, Kassim Al-Khatib. PPT slide handouts available here: Glyphosate Stewardship: Keeping an Effective Herbicide Effective by Tim Miller, Brad Hanson, Ed Peachey, Rick Boydston, Kassim Al-Khatib Preventing and Managing Glyphosate-Resistant Weeds in Orchards and Vineyards by Ed Peachey, Rick Boydston, Brad Hanson, Kassim Al-Khatib Managing Glyphosate-Resistant Weeds in Glyphosate-Resistant Crops by Kassim Al-Khatib, Brad Hanson, Tim Miller, Ed Peachey, Rick Boydston These bulletins are being published by UC-IPM and the near-final versions are available right now  at this link.  Or at: http://www.ipm.ucdavis.edu/IPMPROJECT/glyphosateresistance.html. Take care, Brad Read more orchard weed management blog posts at UC Weed Science