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CWSS Conference Proceedings – 2015 Proceedings 67th ANNUAL CALIFORNIA WEED SCIENCE SOCIETY “California Weeds – Weather or Not…Controlling Weeds under Challenging Climatic Conditions” Fess Parker DoubleTree Resort Santa Barbara, California January 21, 22, & 23, 2015 CWSS 1948-2015 2015 Proceedings of the California Weed Science Society Volume 67 Papers Presented at the 67th Annual Conference January 21, 22, & 23, 2015 Fess Parker DoubleTree Resort 633 East Cabrillo Boulevard Santa Barbara, California 2014/2015 Officers and Board of Directors: Rick Miller, President John Roncoroni, Vice President/Program Chair Kate Walker, Secretary Steve Fennimore, Past President Dave Blodget, Director Oleg Daugovish, Director Josie Hugie, Director Steve Orloff, Director Jesse Richardson, Director Judy Letterman, Business Manager/Treasurer Preface The proceedings contain contributed summaries of papers presented at the annual conference, year-end financial statement, award winners, sponsors, exhibitors, and names, addresses and email addresses given by permission of those attending the meeting. Table of Contents 2015/2016 Board of Directors ............................................................................................................ 7 2015 Conference Sponsors .............................................................................................................8 2015 Conference Exhibitors ..........................................................................................................9 2015 Honorary Member Award – Michelle LeStrange ...............................................................10 2015 Award of Excellence – Deb Shatley .....................................................................................11 2015 Award of Excellence – Barry Tickes ....................................................................................12 2015 Student Awards ...................................................................................................................13 In Memoriam ................................................................................................................................14 Oral Paper Summaries WEED SCHOOL: AQUATIC WEED MANAGEMENT WORKSHOP Chair: John Madsen Introduction to the Aquatic Environment .......................................................................................17 Mike Blankinship, Blankinship & Associates, Davis Overview of Management Options for Controlling Aquatic Weeds ..............................................18 John Madsen, USDA-ARS Exotic and Invasive Weed Research Unit, Davis STUDENT ORAL PRESENTATIONS Chair: Oleg Daugovish A Comparison of Automated Thinners with Hand Thinning of Lettuce in the Salinas Valley ....... 19. Elizabeth Mosqueda* and Anil Shrestha, California State University, Fresno; Richard Smith University of California Cooperative Extension, Monterey County Dose Response of Transplanted Tomatoes to Pre-plant Herbicides ...............................................20 Jorge Angeles*, Anil Shrestha, California State University, Fresno; Kurt Hembree, University of California Cooperative Extension, Fresno Hybridization and the Selection of Adaptive Traits in Large Statured Invasive Grasses ...............22 Randall Long, University of California, Santa Barbara Duration of Weed Free Period in Organic Lettuce: Crop Yield, Economics, and Crop Quality ........................................................................................................................................................23 Sarah R. Parry*, Ryan Cox, and Anil Shrestha, California State University, Fresno 1 Uncovering the Mechanism of Resistance to Propanil in Ricefield Bulrush (Schoenoplectus mucronatus (L.) Palla) from Rice Fields of California ...................................................................24 Rafael Pedroso, University of California, Davis GENERAL SESSION Chair: Rick Miller Herbicide Discovery: The Search for New Modes of Action ........................................................26 Olena Castello, Cliff Gerwick, Tim Johnson, Paul R. LePlae Jr., William Lo, and Joshua Roth*, Dow AgroSciences, Indianapolis, IN Herbicide Discovery Screening – Back to the Future? ..................................................................27 Rex Liebl, BASF, RTP, North Carolina TREE & VINE Chairs: Dave Cheetham and Seth Gersdorf Managing Junglerice and Other Summer Grasses in Orchards ......................................................28 Brad Hanson, Marcelo Moretti, and Seth Watkins, University of California, Davis Pre and Post Emergent Control of Horseweed in Vineyards; A Season Long Approach ..............29 Mick Canevari, Paul Verdegaal, Don Colbert, Randall Wittie, University of California Cooperative Extension, San Joaquin County Burn-down Control of Tough Weeds in Grapes with Flazasulfuron ..............................................33 Kurt Hembree* and James Schaeffer, University of California Cooperative Extension, Fresno County Revisiting the Principles of Integrated Weed Management in Vineyards ......................................34 Anil Shrestha and Kaan Kurtural, California State University, Fresno; Kurt Hembree and Matthew Fidelibus, University of California Cooperative Extension, Fresno Grower Perspective for Weed Control in Grape Vines ..................................................................36 Todd Berg, Trinchero Family Estates, St. Helena AQUATICS Chairs: Andrew Skibo and Joe Vassios Action Threshold Based Cyanobacteria Management for Preserving Drinking Water ..................37 Dave Blodget*, Shaun Hyde, and West Bishop, SePRO Corporation 2 Abundance and Size Distribution of Aquatic Plant Fragments Following Typical Mechanical Harvesting Operations at Lake Tahoe ........................................................................ 38 Lars Anderson*, WaterweedSolutions, Chad Johnson and Jeremy Waites, SEA Controlling Invasive Aquatic Weeds in the Sacramento-San Joaquin Delta .................................. 39 Angela Llaban, California State Parks, Division of Boating and Waterways Eurasian Watermilfoil Control in the Western U.S ....................................................................... 40 John D. Madsen, USDA-ARS EIWRU, University of California, Davis NEW TECHNOLOGY Chairs: Carl Bell and Lynn Sosnoskie A Historical View of Weed Control Technology That Informs Current Practice and Future Development ................................................................................................................................. 41 Carl Bell, University of California, San Diego Impact of Automated Thinners on Weeds and Lettuce Production ............................................... 44 Richard Smith, University of California Cooperative Extension, Monterey County Using Your Smartphone for More than Facebook and Fantasy Football: Apps That Can Make You a Better Weed Scientist ......................................................................................................... 45 Lynn M. Sosnoskie, University of California, Davis The Role of Biotechnology in Weed Research and Weed Management ...................................... 46 Sarah Morran, University of California, Davis ROADSIDES, UTILITIES & INDUSTRIAL SITES Chairs: Bill Nantt and Jason Robbins Invasive Plant Management at East Bay Regional Parks .............................................................. 48 Casey Brierley and Pam Bietz, East Bay Regional Park District Computer Controlled Chemical Injection Spray Truck Used at Solano Irrigation District ........... 49 Jeff Null, Solano Irrigation District Bare Ground and Invasive Weed Treatments in the North State .................................................. 50 Dustin Johnson, Siskiyou County Department of Agriculture Comparing the Performance of Newer Products to Older Standards ............................................ 51 Scott Nissen, Colorado State University 3 TURFGRASS & LANDSCAPE Chairs: Jim Baird and Dean Mosdell Landscape Weed Control .............................................................................................................. 52 John T. Law Jr. Ph.D., ValleyCrest Companies Control of English Lawn Daisy, Kikuyugrass and Annual Bluegrass............................................ 53 Mark Mahady, Mark M. Mahady & Associates, Inc., Carmel Valley AGRONOMY Chairs: Pedro Hernandez and Steve Wright Weed Community Composition and Species Shifts in Conservation – and Conventional-tilled Cotton – Tomato Rotations With and Without Cover ................................................................... 60 Anil Shrestha, California State University, Fresno, Kurt Hembree, University of California Cooperative Extension, Fresno, Jeff Mitchell, University of California, Davis Impact of Weed Seed in Dairy Manure and Weed Spread in Agronomic Crops .......................... 61 Steven D. Wright and Thomas A. Shultz, University of California Cooperative Extension, Tulare County, David W. Cudney, University of California, Riverside Recent Research Development on Palmer Amaranth and Junglerice in the Southern San Joaquin Valley ............................................................................................................................................ 63 Sonia Rios, University of California Cooperative Extension, Riverside/San Diego County, Steve Wright and Sarah Parry, University of California Cooperative Extension, Tulare/Kings Counties, Anil Shrestha, California State University, Fresno Managing Field Bindweed in Field Crops and Vegetables ..........................................................
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