2018 Prune Research Reports
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2018 PRUNE RESEARCH REPORTS Published January 2019 (revised 01/30/19) by The California Prune Board (The California Dried Plum Board) **Not for Publication and not to be cited without authorization of author(s) C A L I F O R N I A D R I E D P L U M B O A R D 3017 Douglas Blvd Phone (916) 565-6232 Suite 280 Fax (916) 565-6237 Roseville, CA 95661 www.CaliforniaDriedPlums.org January 2, 2019 Dear Reader: This report summarizes the results to date of the 2018 research projects conducted by University of California and other researchers. California Dried Plum Board (CDPB) funding for these projects totaled $250,000. I would like to extend my thanks to John Taylor who serves as Chairman of the CDPB Crop Management & Sustainability Research Subcommittee and continues to bring his depth of knowledge and experience to this role. Along with John’s leadership, the Research Program would not function without the assistance of Franz Niederholzer, U.C. Extension Orchard Systems Farm Advisor, who serves as our University Liaison, Luke Kinney-Milliron, Orchard Systems Advisor Butte, Tehama & Glenn Counties and U.C Extension Prune Workgroup Chairman and Gary Obenauf, President of Agricultural Research Consulting, who coordinates the CDPB Research program. I would also like to take this opportunity to recognize Richard Buchner for his years of dedicated work towards improving prune orchard management and profitability. As a critical component of this program, staff and the subcommittee establish strategic priorities and systematically assess the return on investment that the CDPB contribution delivers to prune growers and handlers. It is our intention to continually ensure that resources are directed towards projects that help growers avoid unnecessary losses and enhance profitability. The expertise and commitment of the Research Subcommittee members listed below are appreciated. If you have any questions about individual research projects, please contact Gary Obenauf at (559) 449-9036. Sincerely- Donn Zea Executive Director CROP MANAGEMENT & SUSTAINABILITY RESEARCH SUBCOMMITTEE MEMBERS Bob Amarel, Jr. Ranvir Singh Matt Bozzo (Co-Chair) James Strong Concetta Cotter John Taylor (Chair) Matt Kelly Joe Turkovich Mark Kettmann Mike Turkovich Bob Kolberg Michael Vasey Dave Loquaci Mike Verschagin Nick Micheli Melvin Ward Pete Righero David Wohletz An instrumentality of the Department of Food and Agriculture, State of California TABLE OF CONTENTS Revised January 30, 2019 Manager Letter/CDPB 2018 Research Subcommittee CDPB 2018 Research Budget Summary ................................................................................................... 4 2018 Prune Workgroup Meeting Agenda .............................................................................................. 5-7 REPORTS Varietal Improvement 2018 Dried Plum Cultivar Development and Evaluation. 85 CPB 3. DeJong, T.M. and S. J. Castro ........................................................................................... 8-21 Development of Molecular Markers Associated in Dried Plum (Prunus domestica). 18 CPB 1. Fernandez, Angel i Marti, Sarah Castro, Ted DeJong and Richard Dodd ..................................... 22-25 Added: Genomic profiling and development of a comprehensive catalogue of plum germplasm using Genotyping-By-Sequencing (GBS). 15 CPB 1. Dardick, Chris and Tetyana Zhebentyayeva. Added: Whole Genome Sequencing of Prunus domestica cv Improved French. 18 CPB 1. Dardick, Chris and Tetyana Zhebentyayeva. Rootstocks Field Evaluation of Prune Rootstocks at Grower Trials, 2018. 09 CPB 2. Milliron, Luke, Franz Niederholzer, Rick Buchner, Joe Connell, Allan Fulton, Mark Gilles, Ted DeJong and Sarah Castro ........................................................................................................................................... 26-39 2018 Field Evaluation of Prune Rootstocks at Wolfskill. 16 CPB 1. Jarvis-Shean, Katherine, Rick Buchner, Franz Niederholzer, Ted DeJong, Sarah Castro and Carolyn DeBuse .......................... 40-47 Flower and Fruit Development Managing Heat at Prune Bloom in ‘French’ Prune, 2018. 08 CPB 2, Niederholzer, Franz, R. Buchner, L. Milliron, D. Lightle, K. Jarvis-Shean and P. Gordon........................................... 48-52 Bloom and Postbloom Prune Management Practices for More Consistent Production of High Quality Prunes. 16 CPB 2, Niederholzer, Franz, and L. Milliron. ...............................................53-60 Diseases Epidemiology and Management of Blossom, Leaf, and Fruit Diseases of Prune. 07 CPB 6. Adaskaveg, Jim .................................................................................................................................. 61-69 Diagnosis, Etiology, Epidemiology and Management of Canker Diseases in Dried Plums. 13 CPB 2. Michailides, Themis J., Young Luo, Franz Neiderholzer, Dan Felts, Ryan Puckett, Richard Buchner, Elizabeth Fichtner and Daniella Lightle. ........................................................70-77 Investigating Incidence and Type of Wood Decay Fungi in California Prune Orchards. 15 CPB 2. Johnson, Bob, Franz Neiderholzer, Luke Milliron and Dave Rizzo ............................................78-85 2 Nematodes Characterizing Current Rootstocks of the Dried Plum Industry for Host Status to Pltan-Parasitic Nematodes. 18 CPB 2. Westphal, Andreas.............................................................................. 86-87 Miscellaneous Life Cycle Assessment: A Tool for Quantifying the Environmental Impacts of Fresh and Dried Plum Production. 16 CPB 4. Marvinney, Elias and Alissa Kendall. .......................................................... 88-94 Evaluating Naturally Structured Water in French Prunes. Fulton, Allan and Carolyn Hayes ........ 95-100 2017 Prune Research Tour. Buchner, Richard P. and Franz Niederholzer. .................................. 101-102 Prune research is on the web site http://ucanr.org/sites/driedplum and is searchable. 3 California Dried Plum Board 2018 Research Proposals 2018 CDPB Project 2017 Report Request Number Pages Project Title/Project Leader Reference Pages (2016) Varietal Improvements 85 CPB 3 1-4 Prune Cultivar Evaluation and Development- 8-20$ 90,259 Ted De Jong-UC Davis $ (123,567) 18 CPB 1 5-10 Development of molecular markers associated $ 28,898 with Self-compatibility in dried plum New (Prunus domestica)-Richard Dodd-UCBerkeley 09 CPB 2 11-14 Field Evaluation of Prune Rootstocks-Luke 21-29$ 7,445 Milliron-Butte County $ (2,229) 16 CPB 1 15-17 Field Evaluation of Prune Rootstocks- 30-35$ 5,000 Katherine Pope-Wolfskill $ (2,600) Flower and Fruit Development 08 CPB 2 18-19 Managing Heat at Bloom-Franz Niederholzer- 36-44 $ 15,500 UC Sutter County $ - Diseases 07 CPB 6 20-23 Epidemiology and management of brown rot 48-58 $ 20,000 and rust of prune – Development of an $ (20,000) integrated program with new fungicides and optimal timing-Jim Adaskaveg-UC Riverside 13 CPB 2 24-32 Diagnosis, Epidemology and Management 58-72$ 43,065 of Canker Diseases in Dried Plums- $ (44,304) Themis Michailides-UC Parlier 15 CPB 2 33-36 Investigating Incidence and Type of Wood 73-79 $ 75,181 Decay Fungi in Stone Fruit - Dave Rizzo - $ (19,156) UC Davis Nematodes 18 CPB 2 37-41 Characterizing current rootstocks of the dried $ 18,378 plum industry for host status to plant-parasitic New nematodes - Andreas Westphal - Kearney/Parlier Miscellaneous 10 CPB 2 42-44 California Dried Plum Research Reports 80-82$ 1,500 Database-Carlos Crisosto-UCDavis $ (1,500) 16 CPB 4 45-48 Life Cycle Assessment (LCA) of Prune $ 33,979 Production-Elias Marvinney-UCDavis $ - Research Total $ 339,205 $ (213,356) Page 1 2018 CALIFORNIA DRIED PLUM RESEARCH CONFERENCE AND WORKGROUP MEETING (Hosted by the California Dried Plum Board - Donn Zea, Executive Director and Gary Obenauf, Research Director) Thursday, December 13, 2018, 9:30am – 5:00 pm and Friday, December 14, 2018, 8:30am – 12:30 pm MEETING LOCATION: Safe Food Alliance – Kingsburg Lab 2037 Morgan Drive Kingsburg, CA 93631 HOTEL INFORMATION: Fairfield Inn and Suites Selma Kingsburg 216 Ventura Court Kingsburg, CA 93631 Visit their website here MEETING RSVPs: Please RSVP here: ucanr.edu/survey/survey.cfm?surveynumber=25748. If you have any questions reach out to Becky Poland at [email protected] or Luke Milliron at [email protected]. AGENDA – DAY ONE THURSDAY, 12/13/18 9:20 – 9:30 Coffee and pastries will be provided at the meeting. Introduction 9:30 – 9:45 Introduction to the 2018 Prune Research Conference and Workgroup with highlights of 2018 UCCE prune extension activities and plans for the year ahead. Luke Milliron, UCCE Farm Advisor Butte, Glenn and Tehama counties. 9:45 – 10:00 California Dried Plum Board Welcome and Introductory Comments. Bloom Management Research 10:00 – 10:20 Measuring heat risk at bloom (08 CPB 2). Dr. Franz Niederholzer, UCCE Farm Advisor Sutter, Yuba and Colusa Counties. 10:20 – 10:45 Thinning for consistent fruit production (report). Franz Niederholzer UCCE Farm Advisor Sutter, Yuba and Colusa Counties. 10:45 – 11:00 Blossom Application of Growth Regulators to Improve Fruit Set (Proposal). Dr. Kelsey Galimba postdoctoral researcher in the lab of Dr. Ann Callahan USDA-ARS, Appalachian Fruit Research Station. 11:00 – 11:15 Break 11:15 – 11:35 Life cycle assessment: A tool for quantifying the environmental impacts of fresh and dried plum production. Dr. Elias Marvinney with Dr. Alissa Kendall, Civil and Environmental Engineering UCD and Sonja Brodt, Agricultural Sustainability