Proceedings 69TH ANNUAL - California Weed …

1 California WEED SCIENCE SOCIETY Proceedings 69th ANNUAL Weed Management in a Changing Agricultural/Urban environment PORTOLA HOTEL & SPA Monterey, California January 18, 19, & 20, 2017 CWSS 1948-2017 i 2017 Proceedings of the California Weed Science Society Volume 69 Papers Presented at the 2017 ANNUAL Conference January 18, 19, & 20, 2017 Portola Hotel and Spa Two Portola Plaza Monterey, California 93940 2016/2017 OFFICERS AND BOARD OF DIRECTORS Katherine Walker, President Maryam Khosravifard, Vice President/Program Chair Joe Vassios, Secretary John Roncoroni, Past President Dave Blodget, Director Ben Duesterhaus, Director Gil Del Rosario, Director Josie Hugie, Director Scott Oneto, Director Spencer Halsey, Business Manager/Treasurer Preface The Proceedings contain contributed summaries of papers and posters presented at the ANNUAL conference, year-end financial statement, award winners, sponsors, exhibitors, and names.

2 Addresses and email addresses given by permission of those attending the meeting. ii TABLE OF CONTENTS 2017/2018 Board of Directors ..1 2017 Conference Sponsors ..2 2017 Conference Exhibitors ..3 2017 President s Award for Lifetime Achievement Steve Wright ..4 2017 Honorary Member Steve Orloff ..5 2017 Honorary Member Judy Letterman ..6 2017 Student Awards ..7 In Oral Paper Summaries WEED SCHOOL SESSION Glyphosate Herbicide: Separating the Fact from the Fiction .. 11 Challenges of Weed Management in Urban Areas ..12 Integrated Weed Management is Needed Now More Than Ever ..13 STUDENT ORAL SESSION Application of Partially Stabilized Organic Amendments to Inactivate Brassica nigra (a Weed) and Fusarium oxysporum (a Fungal Pathogen) Using Soil Biosolarization.

3 15 Spatio-Temporal Ecological Modeling of Water Hyacinth environment on the Perform- ance of a Biological Control Agent .. 17 Dormancy Requirements of Hairy Fleabane (Conyza bonariensis) Seeds ..18 Response of Walnuts to Simulated Drift of Rice Herbicides .. 20 TREE AND VINE SESSION Palmer Amaranth (Amaranthus palmeri) Management Issues in California ..21 Sharp-Point Fluvellin: The Creeping Menace Identification, Biology and Control of Kickxia elatine ..24 Paraquat-Resistant Italian Ryegrass Management Options in Orchard Crops in iii California .. 25 Environmental and Soil Factors Influencing Pre-emergent Herbicide Activity .. 27 AQUATICS SESSION Integrated Adaptive Management of Aquatic Weeds: The USDA-ARS Delta Region Areawide Aquatic Weed Project (DRAAWP).

4 28 Hydrilla Eradication Challenges, Partnerships and Lessons Learned .. 30 Lake Tahoe Aquatic Plant Management Program .. 31 The California Delta Aquatic Plant Invaders Identification and Management .. 32 BERRY CROPS SESSION Organic/Non-Chemical Weed Management Options in Strawberries .. 33 Weed Management in Organic Cane Berry Production ..35 Weeds as Hosts for Lygus Bug .. 36 Chemical Weed Control in Berry Crops ..37 ROADSIDES, UTILITIES AND INDUSTRIAL SITES SESSION Roadside and Invasive Vegetation Management in Lassen County, California .. 39 Diablo Canyon Land Stewardship Program and Gaining Ground on Invasive ANNUAL Grasses - New Options to Rehabilitate Our Natural Areas ..41 The Next Generation of Vegetation Management and Stewardship ..42 TURF & ORNAMENTAL SESSION Turfgrass Weed Control and Best Management Practices.

5 43 Phytotoxicity of Herbicides and Abiotic Factors to Landscape and Turf .. 46 Healthy Schools Act: 2016 Update for Turf and Landscape ..47 Updates in Turfgrass Plant Growth Regulator Research ..48 AGRONOMY Spread and Management of Herbicide Resistant Weeds in California Rice ..50 Before Roundup Ready Crops: Was Weed Control that Great? ..51 iv Sharpen Two New PPO Herbicides for Established Alfalfa ..56 Nozzle Technologies for Effective Weed Control ..57 FORESTRY, RANGE AND NATURAL AREAS Interactive Effects of Grazing, Glyphosate Rate, and Application Timing on Barb G oatgrass Seedhead Production ..58 Ecologically-based Adaptive Management of Perennial Pepperweed for Endangered Species and Tidal Marsh Recovery ..59 Reforestation Following Wildfire.

6 60 VEGETABLE CROPS Digital Crop Protection: Using Computer Vision and Machine Learning to Recognize and Selectively Eliminate Weeds ..61 Automated Weeders: Where Are They Headed? ..62 Artichoke Weed Control: Then, Now and In the Future ..64 Overview of Organic Weed Control in Leafy Vegetable Production on the California Central Coast and Imperial Valley ..66 LAWS AND REGULATIONS Protecting Surface Water from Pesticide Contamination in California ..67 New Applicator Certification and Continuing Education (CE) Regulations ..68 New Training Topics for Workers and Handlers and How to Tackle Them ..69 Pesticide Jeopardy ..70 Student Poster Summaries Application of Partially Stabilized Organic Amendments to Inactivate Brassica nigra (a Weed) and Fusarium oxysporum (a Fungal Pathogen) Using Soil Biosolarization.

7 71 Effects of Seeding Depth on Weed Control in Drill-Seeded Rice ..73 Temperature, Glyphosate Interactions within Roundup Ready Alfalfa ..74 v Mechanical Measures Taken for Weed Control in the Mechanical Harvest of Bell Peppers ..75 A Population of Italian Ryegrass from Sonoma County, California Exhibits Resistance to Fluazifop and Glyphosate ..76 Is Glyphosate Resistance in Junglerice (Echinochloa colona L.) Temperature-Dependent? ..77 Dormancy Requirements of Hairy Fleabane (Conyza bonariensis) Seeds ..79 Weed Seed Inactivation Using Biosolarization with Mature Greenwaste Compost and Tomato Pomace Amendments ..81 Cash Flow Report and Investments ..82 Honorary Members List ..83 Award of Excellence Members List ..84 Conference Attendees List ..85 Conference History.

8 101 1 California Weed Science Society 2017/2018 Board of Directors President Maryam Khosravifard Sr. Environmental Scientist (Supervisor) State Water Resources Control Boards Phone: (916) 323-3427 Director - Steering Ben Duesterhaus Mid Valley Ag Services Technical Services Agronomist Phone (209) 351-7089 Vice-President/Program Chair Joseph Vassios Account Manager, Aquatics United Phosphorus, Inc. Phone : (719) 740-9291 Director - Non-conference Education Open Secretary Travis Bean Assistant Cooperative Extension Specialist University of California , Riverside Phone: (951) 827-5130 Director - Membership Josie Hugie Crop Research Manager Wilbur Ellis Phone: (916) 216-8744 Past President Katherine Walker Technical Service BASF Corporation Phone: (919) 358-6123 Director - Student Liaison Scott Oneto Farm Advisor/County Director UC Coop Ext/ Central Sierra Phone: (209) 223-6834 Director - Finance Dave Blodget Aquatic Specialist Alligare, LLC Phone: (661) 599-3231 Director - Public Relations Gil Del Rosario MLA, PCA.

9 Sales Representative Dow AgroSciences, LLC Phone: (949) 878-7371 Business and Office Managers (non-voting) Spencer Halsey & Celeste Elliott CWSS Business Office Box 1961 West Sacramento, CA 93912 Phone: (831) 442-3536 Fax: (831) 442-2351 (Spencer) (Celeste) 2 The California Weed Science Society wishes to thank the following companies for their generous support of the 69th ANNUAL Conference. Sponsor Level I CWSS Business & Awards Luncheon BASF Oro Agri Sponsor Level II Wednesday Night Member Reception Dow AgroSciences Syngenta Sponsor Level III Coffee Break Alligare, LLC Cygnet West Enterprises, Inc. Sponsor Level IV Student Support Wilbur-Ellis Sponsor Level V General Applied Biochemists/Lonza Aquatic Environments PAPA 3 2017 CWSS EXHIBITORS ALLIGARE, LLC HELENA CHEMICAL CO.

10 AMVAC CHEMICAL NEUDORFF USA APPLIED BIOCHEMISTS NICHINO AMERICA, INC. AQUATIC ENVIRONMENTS NORSTAR INDUSTRIES, INC. ARBORJET ORO AGRI BASF T & O PAPA BAYER VEGETATION MGMT SEPRO BRANDT SPRAYTEC California VETERAN SUPPLY SYNGENTA CAPCA TARGET SPECIALTY PRODUCTS CLEAN LAKES, INC. UCANR CROP PRODUCTION SVCS, INC. UNIPHOS CYGNET ENTERPRISES WEST, INC. UPI, INC. DOW AGROSCIENCES VAN BEURDEN INSURANCE SVCS DUPONT CROP PROTECTION WESTBRIDGE AG PRODUCTS ECO-PAK WILBUR-ELLIS CO. GOAT THROAT PUMPS 4 STEVE WRIGHT - PRESIDENTIAL AWARD FOR LIFETIME ACHIEVEMENT IN WEED SCIENCE (presented by Past President John Roncoroni) The Presidential Award for Lifetime Achievement in Weed Science has been awarded to Steve Wright.