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2013 Proceedings of the California Weed Science Society Volume 65

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2013 Proceedings of the California Weed Science Society Volume 65 2013 Proceedings of the California Weed Science Society Volume 65 Papers Presented at the 65th Annual Conference January 23, 24, & 25, 2013 Hyatt Regency Sacramento 1209 L Street Sacramento, California 2012/2013 Officers and Board of Directors: Chuck Synold, President Steve Fennimore, Vice President/Program Chair Rick Miller, Secretary Michelle Le Strange, Past President Wes Croxen, Director Oleg Daugovish, Director Josie Hugie, Director Bruce Kidd, Director Milt McGiffen, Director Steve Orloff, Director Judy Letterman, Business Manager/Treasurer Preface The proceedings contain contributed summaries of papers presented at the annual conference as well as the minutes of the annual business meeting, year-end financial statement, award winners, sponsors, exhibitors, and names, addresses and phone numbers and email addresses given by permission of those attending the meeting. Table of Contents California Weed Science Society and the Story of the Short Handled Hoe .......................................... 7 Norman D. Akesson, University of California, Davis 2013/2014 Board of Directors ............................................................................................................... 9 2013 Conference Sponsors .................................................................................................................. 10 2013 Conference Exhibitors................................................................................................................ 11 2013 Honorary Member – Scott A. Johnson ........................................................................................ 12 2013 Award of Excellence Recipient – Rick Miller .............................................................................. 13 2013 Student Awards and Scholarship Recipients ............................................................................ 14 Oral Paper Summaries WEED SCHOOL: INTRODUCTION TO MANAGING PERENNIAL WEEDS Chair: Brad Hanson Perennial Plants: The Tricks and Turns of Their Perennating and Overwintering Structures............... 15 Ellen Dean, UC Davis Center for Plant Diversity, Davis, CA STUDENT PAPERS Chair: Oleg Daugovish Evaluation of Saflufenacil on Glyphosate and Paraquat-resistant Hairy Fleabane (Conyza bonariensis)........................................................................................................................................... 17 Michelle R. Dennis, Anil Shrestha, and John Bushoven, Department of Plant Science California State University, Fresno Effect of Postemergence Herbicides and Application Time on Small Grain Injury and Yield .............. 19 Gerardo Banuelos, Anil Shrestha, California State University, Fresno; Steve Wright, Sonia Rios, Kelly Hutmacher, Katie Wilson, Jaime Changala, Nancy Loza, UCCE Tulare/Kings County; Walter Martinez, Tulare County ........................................................... 20 Horseweed (Conyza canadensis) Control in Almond Orchards with Pre- and Postemergence Herbicides in the Southern San Joaquin Valley .................................................................................... 21 Sonia I. Rios, Steve D. Wright, Gerardo Banuelos, Katie Wilson, UCCE Tulare County Weed Population Dynamics in Overhead and Subsurface Irrigated No-Till Cotton Cropping Systems ................................................................................................................................................. 22 Joy Hollingsworth, Bruce Roberts, and Anil Shrestha, Dept. of Plant Science, California State University, Fresno; Jeff Mitchell, Dept. of Plant Science, University of California, Davis; Dan Munk, University of California Cooperative Extension, Fresno 1 2013 CWSS Proceedings Can the Activity of Rimsulfuron be Enhanced with Aquatrols® (Soil Surfactant) in Transplanted Fresh market Deficit Irrigated Tomatoes? ............................................................................................. 23 Sarah Alatorre, Dave Goorahoo, Anil Shrestha, California State University, Fresno GENERAL SESSION: WEED MANAGEMENT: A CAREER WITH A BRIGHT FUTURE IN CALIFORNIA Chair: Chuck Synold, CWSS President Screening for Natural Product Herbicides ............................................................................................ 24 Franck E. Dayan, Daniel K. Owens and Stephen O. Duke, USDA-ARS Natural Products Utilization Research Unit, University, MS Career Opportunities for Weed Scientist .............................................................................................. 29 John J. Jachetta, Ph.D., Dow AgroSciences LLC TREE AND VINE Chairs: Mick Canevari and Jim Mueller The Three Fs: Filaree, Fluvellin, Fleabane (Actually the Two Fs and a W: Filaree, Fluvellin and Willowherb) .......................................................................................................................................... 37 John A. Roncoroni, University of California, Cooperative Extension, Napa Introduction to Adjuvants ..................................................................................................................... 41 Rich Zollinger, Department of Plant Sciences, North Dakota State University, Fargo The Effects of Adjuvants on Herbicide Efficacy .................................................................................. 48 Rich Zollinger, Department of Plant Sciences, North Dakota State University, Fargo Post-emergence Weed Control Options in Tree Nut Orchards ............................................................. 52 Marcelo Moretti, Rolando Mejorado, Seth Watkins, Bradley D. Hanson, University of California, Davis; David Doll, Cooperative Extension Merced County New Herbicide Uses for California Tree and Vine Crops .................................................................... 58 Kurt Hembree, University of California Cooperative Extension, Fresno County AQUATICS Chairs: Dave Blodget and Chuck Jeffries Broad Spectrum Aquatic Weed and Algae Control in Irrigation Canals Using Endothall .................... 59 Joseph D. Vassios, United Phosphorous Inc., Rocklin, CA Management of Western Watermilfoil in the Friant-Kern Canal .......................................................... 60 Eric Quinley, Friant Water Authority, Lindsay, CA Integrated Vegetation Management in Flood Control and Urban Creek Settings ................................. 66 Chuck Jeffries, Integra IVM, Concord, CA 2013 CWSS Proceedings 2 Integrated Herbicide Program for Control of Aquatic Weeds and Algae in Irrigation Canal Systems ................................................................................................................................................. 70 Dave Blodget, SePRO Corporation, Bakersfield, CA Best Management Practices for Aquatic Weed Control in Canals ........................................................... 71 Jeff Null, Solano Irrigation District ORGANIC SYSTEMS Chairs: Celeste Gilbert and Tom Lanini Biopesticides Role in Organic Weed Control ....................................................................................... 72 Pamela G. Marrone, Marrone Bio Innovations, Davis, CA Organic Herbicide Performance in Field Trials .................................................................................... 73 W. Thomas Lanini, Dept. of Plant Sciences, University of California, Davis Evaluation of Options for Weed Control in Organic Vineyards, Vegetables, and Berry Cropping Systems ................................................................................................................................................ 76 Anil Shrestha1*, Kaan Kurtural1, Matthew Fidelibus2, Srinivasa Konduru1, Sara Alatorre1, Gary Banuelos3, and Annabel Rodriguez3.1California State University, Fresno, 2University of California, Kearney Agricultural Center, Parlier, CA 3USDA-ARS, Parlier, CA Manuka Oil as a Potential Natural Herbicide ....................................................................................... 79 Franck Dayan & Daniel K. Owens, USDA ARS, University, MS ROADSIDES, UTILITIES AND INDUSTRIAL SITES Chairs: Will Harrison, Bill Nantt and Dan Wickham Tracking Herbicide Movement – Post Application ............................................................................... 83 Marvin L. Clark, CalTrans Districts 6 & 9, Fresno, CA The Basics of Herbicide-Resistant Weeds ............................................................................................ 85 Brad Hanson, Department of Plant Sciences, University of California, Davis Biotic or Abiotic Damage: Herbicide or Something Else ..................................................................... 89 Tom Lanini and Clyde Elmore, Dept. of Plant Sciences, University of California, Davis TURFGRASS AND LANDSCAPE Chairs: Chuck Ingels and Dave Phelps Use of Less-Toxic Herbicides and Sheet Mulching in Landscapes ...................................................... 94 Dave R. Phelps, Cagwin and Dorward, Novato, CA Chemical Strategies for Overseeding Success ...................................................................................... 99 Jim Baird, Dept. of Botany and Plant Sciences, University of California, Riverside 3 2013 CWSS Proceedings AGRONOMY Chairs: Ryan Bounds and Doug Munier Roundup Ready Technology Overview .............................................................................................. 104 Harry Cline, Editor, Western Farm Press Glyphosate-Resistant Weeds Worldwide ............................................................................................ 110 Ian
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