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California Leafy Greens reports are listed by the date and project name.  Click on the project name link to open a pdf of the project for more detailed information.

2024 REPORTS

Year Report Name Principal Investigators
2024 Breeding Baby Leaf Spinach for California Growers Charles Brummer
2024 Nitrogen availability from common cereal cover crops terminated at different growth stages Daniel Geisseler
2024 Using Sudangrass and Sorghum-Sudangrass hybrids as cover crops following leafy greens to mitigate water and soil related issues in the Salinas Valley Michael Cahn
2024 Spinach diversity and the biology of the spinach downy mildew pathogen Jim Correll
2024 Tackling the triple threat of thrips, pythium, and impatiens necrotic spot virus using plant elicitors and soil amendments with biological control activity Kerry Mauck
2024 Understanding the molecular mechanisms of viral infection in lettuce leaves in support of the USDA lettuce breeding program Renee Eriksen
2024 Soil disinfestation with steam Steve Fennimore
2024 Thrips RNAi Technology Daniel Hasegawa
2024 Enhanced surveillance strategies of thrips vectors and understanding the interplay between INSV and Pythium Wilt of lettuce Daniel Hasegawa
2024 Insecticide Resistance, Spray Coverage, and Monitoring for Western Flower Thrips in Lettuce Ian Grettenberger
2024 Screening of Commercial Lettuce Cultivars for Resistance Against Verticillium Races 1, 2, and 3 Krishna Subbarao
2024 Carbon Nanoparticle Addition to Fertilizers as a Strategy to Improve Lettuce Yields and Nitrogen Recovery While Reducing Nitrate Leaching Arun Jani
2024 Spinach and Lettuce Downy mildew epidemiology and control Steve Klosterman
2024 Characterizing the accumulation of impatiens necrotic spot virus (INSV) in lettuce tissues and incidence in thrips vectors Bill Wintermantel
2024 Application of  soil amendments for improved soil health and management of Fusarium of lettuce Nicolas LeBlanc
2024 Development of a molecular assay for Fusarium oxysporum f. sp. lactucae Frank Martin
2024 Development of a molecular diagnostic assay for Pythium uncinulatum Frank Martin
2024 Screening Lettuce CRISPR Lines for Resistance against Huma Pathogens Maeli Melotto
2024 Breeding Crisphead and Leafy Lettuce Richard Michelmore
2024 Genetic Variation in Lettuce Richard Michelmore
2024 Using Sudangrass as cover crop in rotation with leafy greens to mitigate water and soil related issues in the Imperial Valley Ali Montazar
2024 Monitoring the population of the lettuce Fusarium wilt pathogen in California and occurrence of the disease with Pythium wilt Alex Putman, Jim Correll, Yu-Chen Wang
2024 USDA Lettuce Breeding for Improved Resistance to INSV, Pythium, Verticillium, and Fusarium Kelly Richardson
2024 Comprehensive assessment of INSV and soilborne pathogen outbreaks of lettuce in Salinas Valley Yu-Chen Wang
2024 Lettuce variety evaluation for tolerance to Pythium wilt and INSV coinfection Yu-Chen Wang
2024 Selecting for improved water and nitrogen uptake by focusing on root characteristics David Still
2024 Novel approaches for understanding thrips dispersal using gut content analysis Daniel Hasegawa
2024 Evaluation of INSV and Pythium wilt (Pythium uncinulatum) on spinach Jim Correll
2024
Annual Newsletter and Research Summaries

2023 REPORTS

Year Report Name Principal Investigators
2023 Breeding Baby Leaf Spinach for California Growers Charles Brummer
2023 Evaluation of equipment to improve water and nitrogen management in lettuce Michael Cahn
2023 Water treatment technology using polyacrylamide (PAM) to mitigate sediment and pesticides in agricultural run-off and improve chlorine treatment of tailwater Michael Cahn
2023 Spinach diversity and the biology of the spinach downy mildew pathogen Jim Correll
2023 Assessing the frequency of Pythium wilt and INSV co-occurrence Jose Pablo Dundore-Arias
2023 Understanding the molecular mechanisms of resistance to INSV+Pythium wilt and tipburn in support of the USDA lettuce breeding program Renee Eriksen
2023 Soil disinfestation with steam Steve Fennimore
2023 Thrips RNAi Technology Daniel Hasegawa
2023 Enhanced surveillance strategies of thrips vectors and understanding the interplay between INSV and Pythium Wilt of lettuce Daniel Hasegawa
2023 Novel technologies for effective and sustainable management of thrips and aphids in lettuce precision insecticide applications Ian Grettenberger
2023 Continued monitoring of nitrogen management strategies for leafy greens using soil health William Horwath
2023 Carbon Nanoparticle Addition to Fertilizers as a Strategy to Improve Lettuce Yields and Nitrogen Recovery While Reducing Nitrate Leaching Arun Jani
2023 Lettuce and Spinach Downy mildew detection, epidemiology, and biopesticide evaluation Steve Klosterman
2023 Race Characterization of Verticillium Isolates Recovered from Lettuce Growing Regions Steve Koike
2023 Application of organic soil amendments for improved soil health and management of fusarium wilt of lettuce Nicolas LeBlanc
2023 Development of a molecular assay for Fusarium oxysporum f. sp. lactucae Frank Martin
2023 Development of a molecular diagnostic assay for Pythium uncinulatum Frank Martin
2023 Editing the Lettuce Genome to Reduce Human Pathogen Load on Leaves Maeli Melotto
2023 Breeding Crisphead and Leafy Lettuce Richard Michelmore
2023 Genetic Variation in Lettuce Richard Michelmore
2023 The impact of irrigation and fertilizer management practices on enhancing nutrient management Ali Montazar
2023 Monitoring the population of the lettuce Fusarium wilt pathogen in California and occurrence of the disease with Pythium wilt Alex Putman, Jim Correll
2023 USDA Lettuce Breeding for Improved Resistance to INSV, Pythium, Verticillium, and Fusarium Kelly Richardson
2023 USDA Lettuce Breeding, Genetics, and Physiology Ivan Simko
2023 Screening of romaine and head lettuce varieties for tolerance to Pythium Wilt Richard Smith
2023 Selecting for improved water and nitrogen uptake by focusing on root characteristics David Still
2023 Post-Harvest Quality and Shelf-Life of Lettuce Gail Taylor
2023 Evaluation of INSV and Pythium wilt (Pythium uncinulatum) on spinach Jim Correll
2023  

Annual Newsletter and Research Summaries

2022 REPORTS

Year Report Name Principal Investigators
2022 Verticillium Biology and Epidemiology Krishna Subbarao
2022 Lettuce Breeding and Genetics- USDA Ivan Simko, Beiquan Mou, Kelley Richardson
2022 Baby Spinach Breeding Charles Brummer
2022 Spinach and Lettuce Breeding Beiquan Mou
2022 Downy Mildew Detection, Epidemiology, And Biopesticide Evaluation Steve Klosterman
2022 ID of Additional Viruses Contributing to Lettuce Dieback Bill Wintermantel
2022 Develop Information On Irrigation and Fertilizer Management Practices In The Low Desert Lettuce Ali Montazar
2022 Thrips RNAi Technology Daniel Hasegawa
2022 Pythium Wilt Diagnostic Assay Frank Martin and Austin McCoy
2022 Food Safety Genetic Diversity Maeli Melotto
2022 Improving the Post-Harvest Quality and Shelf-Life Of Lettuce: Qtl to Candidate Genes and Markers and Testing Proof Of Concept Gail Taylor
2022 Physical Pest Management for Leafy Greens using Intelligent Cultivators and Soil Disinfestation with Steam Steve Fennimore
2022 Characterization and Control of Pythium Wilt JP Dundore-Arias
2022 Pam Water Treatment Michael Cahn
2022 Assessment of N Uptake and N Removal of Leafy Greens under Different Production Regimes Richard Smith
2022 Race Diversity and Biology of Spinach Downey Mildew Jim Correll
2022 Monitoring the Population of the Lettuce Fusarium Wilt Pathogen in California Alex Putman
2022 Monitoring seasonal thrips population dynamics and identification of reservoir hosts of Impatiens Necrotic Spot Virus (INSV) in Imperial Valley lettuce production landscape Apurba Barman
2022 Novel Technologies for Effective and Sustainable Management of Thrips and Aphids in Lettuce: Precision Insecticide Applications and Drone Releases of Natural Enemies Ian Grettenberger
2022 Genetic Variation in Lettuce Richard Michelmore
2022 Selecting for Improved Water and Nitrogen Uptake by Focusing on Root Characteristics David Still
2022 Baby Leaf Spinach Breeding Allen Van Deynze
2022 Developing Nitrogen Management Strategies for Leafy Greens Using Soil Health Metrics Cole Smith/Stefanie Kortman (William Horwath/Arlene Haffa)
2022 Evaluating Plant Immunity Priming Agents for Protection Against Virus Infection in Lettuce Kerry Mauck and Daniel Hasegawa
2022 Progress Report- Stemphylium Jim Correll
2022 Breeding Crisphead and Leafy Lettuce Richard Michelmore
2022 Optimizing Single Use Buried Drip Tape Michael Cahn
2022 Pythium wilt Management through Improved Irrigation Practices Michael Cahn, Richard Smith, and JP Dundore-Arias
2022 Evaluating Cover Crop C:N Ratio and Biomass Eric Brennan and Richard Smith
2022 Monitoring and Cultural Strategies to Reduce Thrips Transmitted INSV Daniel Hasegawa

2021 REPORTS

Year Report Name Principal Investigators
2021 Genetic Variation in Lettuce Richard W. Michelmore
2021 Breeding Crisphead and Leafy Lettuce Richard W. Michelmore, María José Truco
2021 Lettuce Breeding and Genetics (USDA) I. Simko, B. Mou, J. D. McCreight, K. L. Richardson
2021 Improving the Post-Harvest Quality and Shelf Life of Lettuce Gail Taylor
2021 Breeding Baby Leaf Spinach for California Growers E. Charles Brummer, Allen Van Deynze, Allison Krill-Brown, Samantha Hilborn, Daniel Pap, Oon Ha Shin, Sheriff-Seedy Phaal
2021 Evaluation of Drip Irrigation in Organic Spinach Production and Downy Mildew Management Ali Montazar
2021 Selecting for Improved Water and Nitrogen Uptake by Focusing on Root Characteristics David W Still
2021 Probing the Genetic Diversity in Lettuce–Escherichia Coli Interactions Maeli Melotto
2021 Harnessing the Leaf Microbiome for Improved Food Safety in Lettuce Gail Taylor
2021 Biology and Epidemiology of Verticillium Wilt of Leafy Vegetables Krishna V. Subbarao
2021 Intelligent Weed Management for Leafy Greens Steven A. Fennimore, Richard F. Smith, Elizabeth Mosqueda
2021 Detection, Epidemiology, and Control of Spinach Downy Mildew Steven J. Klosterman, Alexander I. Putman, Krishna V. Subbarao
2021 Race Diversity and the Biology of the Spinach Downy Mildew Pathogen Jim Correll
2021 Identification and Determination of Disease Incidence and Severity of Leaf Spot Pathogens of Spinach Jim Correll
2021 Identification of Additional Viruses Contributing to Lettuce Dieback Disease William M. Wintermantel
2021 Assessment of N Uptake and N Removal of Leafy Greens Under Different Production Regimes Richard F. Smith, Michael Cahn
2021 Evaluation of Single-Use Buried Drip as a Best Management Practice for Irrigation and Nutrient Management of Lettuce Michael Cahn, Richard Smith
2021 Water Treatment Technology Using Polyacrylamide (PAM) To Control Sediment in Agricultural Run-off and to Improve Chlorine Treatment of Tailwater Michael Cahn
2021 Advancing Understanding of the Biology and Management of Pythium Wilt of Lettuce Dr. JP Dundore-Arias
2021 Field Optimization of Water Flow for the Scaling of a Pesticide-Remediating Bioreactor Dr. Nathaniel Jue, Dr. Arlene Haffa
2021 Area-Wide Monitoring and Management of Aphids in Central Coast Lettuce Daniel K. Hasegawa
2021 Efficacy of Rna Interference (RNAi) Technology to Manage Thrips and Viruses in Lettuce Daniel K. Hasegawa

2020 REPORTS

Year Report name Principal Investigators
2020 Assessing the Impact That Weeds and Other Secondary Plants Have On Insv Incidence in Commercial Lettuce Fields Daniel K. Hasegawa
2020 Spinach Breeding and Genetics Beiquan Mou
2020 Spatial and Temporal Patterns of Western Flower Thrips and Insv (Impatiens Necrotic Spot Virus) In Lettuce Fields in the Salinas Valley and Impacts on Plant Health and Productivity Daniel K. Hasegawa, Alejandro Del-Pozo, JP Dundore-Arias
2020 Evaluation of Drip Irrigation in Organic Spinach Production and Downy Mildew Management Dr. Ali Montazar
2020 Breeding Crisphead and Leafy Lettuce Richard W. Michelmore, María José Truco
2020 Breeding Baby Leaf Spinach for California Growers E. Charles Brummer, Allen Van Deynze, Allison Krill-Brown, Juliana Osorio Marin
2020 Early Detection, Epidemiology, and Control of Spinach Downy Mildew Steven J. Klosterman, Alexander I. Putman, Krishna V. Subbarao
2020 Field Implementation and Assessment of a Pesticide-Remediating Bioreactor Dr. Nathaniel Jue, Dr. Arlene Haffa
2020 Selecting for Improved Water and Nitrogen Uptake by Focusing on Root Characteristics David W Still
2020 Water Treatment Technology Using Polyacrylamide (PAM) To Control Sediment in Agricultural Run-off. Michael Cahn
2020 Lettuce Breeding and Genetics (USDA) I. Simko, B. Mou, J. D. McCreight, K. L. Richardson
2020 Race Diversity and the Biology of the Spinach Downy Mildew Pathogen Jim Correll
2020 Integrating Conservational Biocontrol and Chemical Tactics for Managing Aphids and Thrips in Lettuce Dr. Alejandro Del-Pozo
2020 Insecticide Resistance Monitoring and Evaluation of Efficacy of Current Chemical Tactics for Managing Aphids and Thrips in Lettuce Dr. Alejandro Del-Pozo, Dr. Ian Grettenberger
2020 Confirming the Resistance Breaking and Occurrence of Nasonovia NR:1 Biotype in the Salinas Valley Dr. Alejandro Del-Pozo, Dr. Jim McCreight, Dr. Daniel Hasegawa
2020 Weed Management Systems for Leafy Greens Steven A. Fennimore, Richard F. Smith
2020 An Integrated Vegetated Treatment System for Mitigating Imidacloprid and Permethrin in Agricultural Irrigation Runoff Michael Cahn
2020 Isolate Maintenance and Inoculum Production in Support of the Sclerotinia Resistance Breeding Program in Lettuce Krishna V. Subbarao
2020 Development of a Molecular Assay for Fusarium Oxysporum F. SP. Lactucae Frank Martin
2020 Improving the Post-harvest Quality and Shelf Life of Lettuce Gail Taylor
2020 Genetic Variation in Lettuce Richard W. Michelmore

2019 REPORTS

Year Report Name Principal Investigators
2019 Spinach Breeding and Genetics Beiquan Mou
2019 Biology and Epidemiology of Verticillium Wilt of Leafy Vegetables Krishna V. Subbarao, Dan Chellemi
2019 On-Farm Evaluations of Fertilizer Value of Nitrate in Irrigation Water Richard Smith, Michael Cahn
2019 Breeding Crisphead and Leafy Lettuce Richard W. Michelmore, María José Truco
2019 Breeding Baby Leaf Spinach for California Growers and Developing Baby Leaf Spinach With Lower Cadmium Uptake E. Charles Brummer, Allen Van Deynze, Juliana Osorio Marin
2019 Water Treatment Technology Using Polyacrylamide (PAM) to Control Sediment in Agricultural Run-Off. Michael Cahn
2019 An Integrated Vegetated Treatment System for Mitigating Imidacloprid and Permethrin in Agricultural Irrigation Runoff Michael Cahn
2019 Identification of Additional Viruses Contributing to Lettuce Dieback Disease William M. Wintermantel
2019 Race Diversity and the Biology of the Spinach Downy Mildew Pathogen Jim Correll
2019 Integrating Conservational Biocontrol and Chemical Tactics for Managing Insect Pests in Lettuce Dr. Alejandro Del-Pozo
2019 Weed Management Systems for Leafy Greens Steven A. Fennimore, Richard F. Smith
2019 Improving the Post-harvest Quality and Shelf Life of Lettuce Gail Taylor
2019 Risk Assessment, Early Detection, and Control of Downy Mildew of Lettuce and Spinach Steven J. Klosterman, Alexander I. Putman, Krishna V. Subbarao
2019 Isolate Maintenance and Inoculum Production in Support of the Sclerotinia Resistance Breeding Program in Lettuce Krishna V. Subbarao
2019 Development of a Molecular Assay for Fusarium Oxysporum F. SP. Lactucae Frank Martin
2019 Evaluation of Drip Irrigation in Organic Spinach Production and Downy Mildew Management Dr. Ali Montazar
2019 Lettuce Breeding and Genetics (USDA) I. Simko, B. Mou, J. D. McCreight, K. L. Richardson
2019 Genetic Variation in Lettuce Richard W. Michelmore

2018 REPORTS

Year Report Name Principal Investigators
2018 Biology and Epidemiology of Verticillium Wilt of Leafy Vegetables Krishna V. Subbarao, Dan Chellemi
2018 Breeding Baby Leaf Spinach for California Growers E. Charles Brummer, Allen Van Deynze, Juliana Osorio Marin
2018 Control of Soil Pests With Band Steam for Leafy Greens Steven A. Fennimore, David C. Slaughter
2018 Developing Baby Leaf Spinach With Lower Cadmium Uptake E. Charles Brumme, Allen Van Deynze
2018 Development of a Molecular Assay for Fusarium Oxysporum F. SP. Lactucae Frank Martin
2018 Genetic Variation in Lettuce Richard W. Michelmore
2018 Management of Fusarium Wilt Through Genetic Resistance and Manipulation of the Microbial Community in Soil Thomas R. Gordon
2018 Risk Assessment, Early Detection, and Control of Downy Mildew of Lettuce and Spinach Steven J. Klosterman, Alexander I. Putman, Krishna V. Subbarao
2018 Breeding Crisphead and Leafy Lettuce Richard W. Michelmore, María José Truco
2018 Spinach Breeding and Genetics Beiquan Mou
2018  Race diversity and the biology of the spinach downy mildew pathogen Jim Correll, Steven Koike
2018 Lettuce Breeding and Genetics (USDA) I. Simko, B. Mou, J. D. McCreight
2018 Weed Management Systems for Leafy Greens Steven A. Fennimore, David C. Slaughter, Richard F. Smith

2017 REPORTS

Year Report Name Principal Investigators
2017 Disease Risk assessment, Early Detection, and Disease Control Applications for Downy Mildew of Lettuce and Spinach. Steven J. Klosterman, Neil McRoberts, Krishna V. Subbarao
2017 Biology and Epidemiology of Verticillium Wilt of Lettuce and Spinach Krishna V. Subbarao
2017 Breeding for Increased Water and Nitrogen Use Efficiency David W. Still
2017 Developing Baby Leaf Spinach With Lower Cadmium Uptake E. Charles Brumme, Allen Van Deynze
2017 Influence of Plant Age, Temperature, and Moisture on Springtail Feeding Injury on Lettuce Dr. Shimat Villanassery Joseph
2017 Comparative Fitness of Race 1 and Race 2 Strains of Verticillium Dahliae Affecting Lettuce Alexander I. Putman, Krishna V. Subbarao
2017 Genetic Variation in Lettuce Richard W. Michelmore
2017 Management of Fusarium Wilt Through Genetic Resistance and Manipulation of the Microbial Community in Soil Thomas R. Gordon
2017 Evaluation of Practices to Reduce Cadmium Uptake by Leafy Greens Richard Smith, Tim Hartz
2017 Studies on the Management of Pythium Wilt of Lettuce Steven Koike
2017 Race Diversity and the Biology of the Spinach Downy Mildew Pathogen Jim Correll, Steven Koike
2017 Breeding Crisphead and Leafy Lettuce Richard W. Michelmore, María José Truco
2017 Lettuce Breeding, USDA-ARS I. Simko, B. Mou, J.D. McCreight
2017 Spinach Breeding and Genetics Beiquan Mou
2017 Evaluating New Weed Management Systems for Fresh Market Spinach Richard F. Smith, Steven A. Fennimore
2017 Weed Management Systems for Leafy Greens Steven A. Fennimore, David C. Slaughter, Richard F. Smith

2016 REPORTS

Year Report Name Principal Investigators
2016 Investigation of a New Foliar Disease of Lettuce Caused by Alternaria Dauci Steven Koike, Richard Smith, Barry Pryor
2016 A Freshness Indicator for Leafy Greens Marita Cantwell
2016 The Effects of Planting Date, Varietal Susceptibility and Residue Management on Severity of Fusarium Wilt in Lettuce Thomas R. Gordon
2016 Genetic Variation in Lettuce Richard W. Michelmore
2016 Survey and Management of Springtails in Lettuce Dr. Shimat Villanassery Joseph
2016 Lettuce Breeding, USDA-ARS I. Simko, B. Mou, J.D. McCreight
2016 Spinach Breeding and Genetics Beiquan Mou
2016 Optimizing Nitrate Removal From Tile Drain Water Tim Hartz, Mike Cahn, Richard Smith
2016 Postharvest Physiological Disorders: Pinking in Romaine Hearts Marita Cantwell
2016 Effect of Insecticides Coated to Head Lettuce Seeds for Springtails, Leafminers and Western Flower Thrips Control Dr. Shimat Villanassery Joseph
2016 Evaluation of Practices to Reduce Cadmium Uptake by Leafy Greens Richard Smith, Tim Hartz
2016 DNA-Based Detection and Quantification of the Downy Mildew Pathogen, Peronospora Effusa and Biology and Epidemiology of Downy Mildew of Lettuce. Steve Klosterman, Neil McRoberts, Krishna V. Subbarao
2016 Spinach Downy Mildew Epidemiology Steve Klosterman, Neil McRoberts
2016 Evaluating New Weed Management Systems for Fresh Market Spinach Richard F. Smith, Steven A. Fennimore
2016 Breeding Crisphead and Leafy Lettuce Richard W. Michelmore, María José Truco
2016 Biology and Epidemiology of Verticillium Wilt of Lettuce and Spinach Krishna V. Subbarao, Alex I. Putman
2016 Weed Management Systems for Leafy Greens Steven A. Fennimore, David C. Slaughter, Richard F. Smith

2015 REPORTS

Year Report Name Principal Investigators
2015 Development of Management Strategies for Bacterial Leaf Spot of Lettuce Carolee Bull
2015 Race Diversity and the Biology of the Spinach Downy Mildew Pathogen Jim Correll, Steven Koike
2015 Weed Management Systems for Leafy Greens Richard F. Smith, Steven A. Fennimore, Surendra K. Dara
2015 The Effects of Planting Date, Varietal Susceptibility and Residue Management on Severity of Fusarium Wilt in Lettuce Thomas R. Gordon
2015 Lettuce Breeding, USDA-ARS R. Hayes, I. Simko, B. Mou, J. D. McCreight
2015 Management Approaches for Thrips and Garden Symphylans in Lettuce Dr. Shimat Villanassery Joseph
2015 Survey and Management of Springtails in Lettuce Dr. Shimat Villanassery Joseph
2015 DNA-Based Detection and Quantification of the Downy Mildew Pathogen, Peronospora Effusa Steve Klosterman, Neil McRoberts
2015 Breeding Crisphead and Leafy Lettuce Richard W. Michelmore, María José Truco
2015 Genetic Variation in Lettuce Richard W. Michelmore
2015 Spinach Breeding and Genetics Beiquan Mou
2015 Evaluation of Best Management Irrigation and Nutrient Best Management Practices (BMP) To Safeguard Water Quality Richard Smith, Mike Cahn
2015 Evaluation of Practices to Reduce Cadmium Uptake by Leafy Greens Richard Smith, Tim Hartz
2015 Increasing Nitrogen Use Efficiency in Lettuce by Screening Root Growth and Nitrogen Uptake During Early Growth. David W. Still
2015 Biology and Epidemiology of Downy Mildew of Lettuce Krishna V. Subbarao, Steven J. Klosterman
2015 Biology and Epidemiology of Verticillium Wilt of Lettuce and Spinach Krishna V. Subbarao
2015 Development of an Alternative Irrigation Water Quality Indicator and Risk Management Tool for Pathotoxigenic E. Coli. Trevor Suslow
2015 Development of Methods for Maintenance of Lettuce-Infecting Tospoviruses, Effective Germplasm Screening, and Identification of Sources of Resistance Dr William M. Wintermantel, Dr. Ivan Simko

2014 REPORTS

Year Report Name Principal Investigators
2014 Development of Management Strategies for Bacterial Leaf Spot of Lettuce Carolee Bull
2014 Evaluation of Best Management Irrigation and Nutrient Best Management Practices (BMP) And Treatment of Nitrate in Tile and Surface Water to Safeguard Water Quality Richard Smith, Mike Cahn
2014 Race Diversity and the Biology of the Spinach Downy Mildew Pathogen Jim Correll, Steven Koike
2014 Weed Management Systems for Leafy Greens Steven A. Fennimore, John Rachuy, Ran Lati, Tom Miller, Richard F. Smith
2014 The Effects of Planting Date and Varietal Susceptibility on Severity of Fusarium Wilt in Lettuce Thomas R. Gordon
2014 Lettuce Breeding, USDA-ARS R. Hayes, I. Simko, B. Mou, J. D. McCreight
2014 Survey and Biology of Maggot (Delia Spp.) In Lettuce in Central Coast of California Dr. Shimat Villanassery Joseph
2014 DNA-Based Detection and Quantification of the Downy Mildew Pathogen, Peronospora Effusa Steve Klosterman, Neil McRoberts
2014 Characterizing Damping-off and Root Rot Pathogens of Spinach in California: Year 2 Steven Koike, Tom Gordon, Frank Martin
2014 Assessing and Optimizing Wood Chip Bioreactor Denitrification Rates Christina David, Marc Los Huertos
2014 Improved Management of Thrips and Tomato Spotted Wilt Virus (TSWV) In California Lettuce Fields Dr. Neil McRoberts
2014 Breeding Crisphead and Leafy Lettuce Richard W. Michelmore, Oswaldo E. Ochoa, María José Truco
2014 Genetic Variation in Lettuce Richard W. Michelmore
2014 Spinach Breeding and Genetics Beiquan Mou
2014 Evaluation of Systemic Acquired Resistance Products and Biologicals for the Control of Spinach Downy Mildew Joe Nunez
2014 Mapping Water and Nitrogen-Use Efficiency in a Recombinant Inbred Line of Lettuce David W. Still
2014 Biology and Epidemiology of Verticillium Wilt of Lettuce Krishna V. Subbarao
2014 Verticillium Wilt of Spinach: Detection, Biology and Control Krishna V. Subbarao
2014 Development of Methods for Maintenance of Lettuce-Infecting Tospoviruses, Effective Germplasm Screening, and Identification of Sources of Resistance Dr William M. Wintermantel, Dr. Ivan Simko

2013 REPORTS

Year Report Name Principal Investigators
2013 Development of Management Strategies for Bacterial Leaf Spot Carolee Bull
2013 Evaluation of an Automated Lettuce Thinner Steven A. Fennimore, Richard F. Smith
2013 Evaluation of Metam Sodium for Control of Lettuce Drop and Weeds in Lettuce Steven A. Fennimore, Krishna Subbarao
2013 Weed Management Systems for Leafy Greens Steven A. Fennimore, Richard F. Smith
2013 DNA-Based Detection and Quantification of the Downy Mildew Pathogen, Peronospora Effusa Steve Klosterman, Neil McRoberts
2013 Race Diversity and the Biology of the Spinach Downy Mildew Pathogen Jim Correll, Steven Koike
2013 Investigation of the Possible Role of Winter Cover Crops in Verticillium Wilt Epidemiology Steven Koike, Richard Smith
2013 Characterizing Damping-off and Root Rot Pathogens of Spinach in California Steven Koike, Tom Gordon, Frank Martin
2013 Genetic Variation in Lettuce Richard W. Michelmore
2013 Breeding Crisphead and Leafy Lettuce Richard W. Michelmore, Oswaldo E. Ochoa, María José Truco
2013 Spinach Breeding and Genetics Beiquan Mou
2013 Management of Thrips on Lettuce Eric T. Natwick
2013 Evaluation of Best Management Irrigation and Nutrient Management Practices (BMP) And Treatment of Nitrate in Tile and Surface Water to Safeguard Water Quality Richard Smith, Mike Cahn, Tim Hartz
2013 Biology and Epidemiology of Verticillium Wilt of Lettuce Krishna V. Subbarao
2013 Verticillium Wilt of Spinach: Detection, Biology and Control Krishna V. Subbarao
2013 Developing Risk-Based Preventive Controls: Synthesis From On-Farm Trials and Research Literature Data-Mining Trevor Suslow
2013 Evaluation of Relative Susceptibility of Lettuce Varieties to Tomato Spotted Wilt Virus and Fusarium Wilt Thomas A. Turini, James D. McCreight
2013 Lettuce Breeding, USDA-ARS R. Hayes, I. Simko, B. Mou, J. D. McCreight
2013 Development of a Method for Conducting Tests for Resistance to Tombusviruses and Lettuce Dieback in the Greenhouse Dr William M. Wintermantel, Dr. Ivan Simko

2012 REPORTS

Year Report Name Principal Investigators
2012 Development of Management Strategies for Bacterial Leaf Spot Carolee Bull
2012 Race Diversity and the Biology of the Spinach Downy Mildew Pathogen Jim Correll, Steven Koike
2012 Development of a Rapid, Quantitative, DNA-Based Assay for v. Dahliae in Spinach Seed Steve Klosterman
2012 Evaluation of Best Management Irrigation and Nutrient Best Management Practices (BMP) And Treatment of Nitrate in Tile Water to Safeguard Water Quality Richard Smith, Tim Hartz
2012 Validation of Rapid Pathogen Detection Methods and Kits Applied to Pre-Harvest Operations for Leafy Greens Production. Trevor Suslow
2012 Identification of Genetic Variability in Lettuce for Nutrient Uptake Jeffrey C. Wong
2012 Genetic Variation in Lettuce Richard W. Michelmore
2012 Development of a Method for Conducting Tests for Resistance to Tombusviruses and Lettuce Dieback in the Greenhouse Dr William M. Wintermantel, Dr. Ivan Simko
2012 Lettuce Breeding, USDA-ARS R. Hayes, I. Simko, B. Mou, J. D. McCreight
2012 Epidemiology and Control of Lettuce Drop Caused by Sclerotinia Krishna V. Subbarao
2012 Breeding Crisphead and Leafy Lettuce Richard W. Michelmore, Oswaldo E. Ochoa, María José Truco
2012 Spinach Breeding and Genetics Beiquan Mou
2012 Testing of RF Biocidics Radiofrequency Disinfection of Verticillium-Infected Spinach and Lettuce Seed Lynn Epstein
2012 Biology and Epidemiology of Verticillium Wilt of Lettuce Krishna V. Subbarao
2012 Verticillium Wilt of Spinach: Detection, Biology and Control Krishna V. Subbarao
2012 Weed Management Systems for Leafy Greens Steven A. Fennimore, Richard F. Smith. Beiquan Mou

2011 REPORTS

Year Report Name Principal Investigators
2011 Effect of Selected Insecticides for Whitefly, Bemisia Tabaci and Lepidoptera Management on Leafy Greens Vonny M. Barlow
2011 Development of Management Strategies for Bacterial Leaf Spot Carolee Bull
2011 A High-Throughput, Culture-Independent Approach to Identify Index and Indicator Species for E. Coli o157:h7 Contamination Gitta Coaker
2011 Race Diversity and the Biology of the Spinach Downy Mildew Pathogen Jim Correll, Steven Koike
2011 Assess the Efficacy of Seed Treatments for Eradicating Verticillium Dahliae From Spinach Seed, Preventing Seed Transmission of v. Dahliae, and Reducing the Risk of Infesting Soils Into Which Infected Spinach Seed Is Planted; And Assess the Influence of Soil Fumigation and Soil PH on Efficacy of These Seed Treatments Lindsey J. du Toit
2011 Weed Management Systems for Leafy Greens Steven A. Fennimore, Richard F. Smith. Beiquan Mou
2011 Survival of Attenuated Escherichia Coli o157:h7 Atcc 700728 in Field Inoculated Lettuce Linda J. Harris, Anne-laure Moyne, Michael D. Cahn, Steve T. Koike
2011 Lettuce Breeding, USDA-ARS R. Hayes, I. Simko, B. Mou, J. D. McCreight
2011 Development of a Rapid, Quantitative, Dna-Based Assay for v. Dahliae in Spinach Seed Steve Klosterman
2011 Spinach Breeding and Genetics Beiquan Mou
2011 Evaluation and Demonstration of Best Management Irrigation and Nutrient Management Practices (BMP) To Safeguard Water Quality Richard Smith, Tim Hartz
2011 Biology and Epidemiology of Verticillium Wilt of Lettuce Krishna V. Subbarao
2011 Verticillium Wilt of Spinach: Detection, Biology and Control Krishna V. Subbarao
2011 Thrips Management in Lettuce Eric Natwick
2011 Development of a Method for Conducting Tests for Resistance to Tombusviruses and Lettuce Dieback in the Greenhouse Dr William M. Wintermantel, Dr. Ivan Simko

2010 REPORTS

Year Report Name Principal Investigators
2010 A High‐Throughput, Culture‐Independent Approach to Identify Index and Indicator Species for E. Coli o157:h7 Contamination Gitta Coaker
2010 Survival of Attenuated Escherichia Coli o157:h7 Atcc 700728 in Field‐Inoculated Lettuce Linda J. Harris
2010 Food Safety Risks Associated With Sheep Grazing in Vegetable Stubble Fields Bruce R. Hoar
2010 Contribution of Phyllosphere Microbiota to the Persistence of Escherichia Coli o157:h7 Atcc 700728 on Field‐Grown Lettuce Maria L. Marco, Linda J. Harris
2010 Fly Reservoirs of E. Coli o157:h7 and Their Role in Contamination of Leafy Greens Astri Wayadande
, Justin Talley
2010 Lettuce Breeding, USDA-ARS R. Hayes, I. Simko, B. Mou, J. D. McCreight
2010 Development of Management Strategies for Bacterial Leaf Spot and Corky Root of Lettuce Carolee Bull
2010 Race Diversity and the Biology of the Spinach Downy Mildew Pathogen Jim Correll, Steven Koike
2010 Verticillium Efforts on Spinach Jim Correll
2010 Evaluation of Seed Treatments for Management of Seedborne Verticillium in Spinach, 2009-10 Lindsey J. du Toit
2010 Weed Management Systems for Leafy Greens Steven A. Fennimore, Richard F. Smith. Beiquan Mou
2010 Development of a Rapid, Quantitative, Dna-Based Assay for v. Dahliae in Spinach Seed Steve Klosterman
2010  Verticillium Wilt of Spinach: Detection, Biology and Control. Objective C: Develop a Sensitive, Robust, Standardized Spinach Seed Health Assay for Verticillium Dahliae Steven Koike, Lindsey du Toit, Krishna Subbarao
2010 Investigation of Tospovirus Outbreaks in California Lettuce Steven Koike, Bob Gilbertson, Yen-Wen Kuo, Tom Turini, Richard Smith
2010 Minimizing Pathogen Transference During Lettuce Harvesting by Optimizing the Design of the Harvesting Device and Operation Practices Yaguang Luo
2010 Breeding Crisphead and Leafy Lettuce Richard W. Michelmore, Oswaldo E. Ochoa
2010 Breeding Leaf Lettuce Richard W. Michelmore, Oswaldo E. Ochoa, María José Truco
2010 Genetic Variation in Lettuce Richard W. Michelmore
2010 Spinach Breeding and Genetics Beiquan Mou
2010 Food Safety and Rodent Control in Leafy Green Crop Terrell P. Salmon
2010 Epidemiology and Control of Lettuce Drop Caused by Sclerotinia Krishna V. Subbarao
2010 Biology and Epidemiology of Verticillium Wilt of Lettuce Krishna V. Subbarao
2010 Verticillium Wilt of Spinach: Detection, Biology and Control Krishna V. Subbarao
2010 Comparison of Surrogate E. Coli Survival and Epidemiology in the Phyllosphere of Diverse Leafy Green Crops Trevor Suslow

2009 REPORTS

Year Report Name Principal Investigators
2009 Breeding Crisphead and Leafy Lettuce Richard W. Michelmore, Oswaldo E. Ochoa
2009 Estimation of the Area Affected by Animal Feces in Vegetable Field Under Overhead Sprinkle Irrigation System Jorge M. Fonseca, Sadhana Ravishankar, Charles Sanchez
2009 Survival of Attenuated Escherichia Coli o157:h7 Atcc 700728 in Field Inoculated Lettuce Linda J. Harris, Anne-laure Moyne, Michael D. Cahn, Steve T. Koike
2009 Survival and Biology of E. Coli Under Field Production Environments Steven Koike, Michael Cahn, Richard Smith
2009 Fusarium Wilt of Lettuce: Management Through Detection, Avoidance and Disease Resistance Thomas R. Gordon
2009 Genetic Variation in Lettuce Richard W. Michelmore
2009 Leaf Lettuce Breeding Richard W. Michelmore, Oswaldo E. Ochoa, María José Truco, Leah McHale
2009 Lettuce Breeding, USDA-ARS R. Hayes, I. Simko, B. Mou, J. D. McCreight
2009 Epidemiology and Control of Lettuce Drop Caused by Sclerotinia Krishna V. Subbarao
2009 Evaluation of Seed Treatments for Management of Seedborne Verticillium in Spinach Lindsey J. du Toit
2009 Spinach Breeding and Genetics Beiquan Mou
2009 Verticillium Wilt of Spinach: Detection, Biology and Control Steven Koike, Lindsey du Toit, Krishna Subbarao
2009 Supporting Aphid Predators by Planting Intercrops With Alternative Prey Kent M. Daane, Nick J. Mills, Erik H. Nelson
2009 Thrips Management in Lettuce Eric Natwick
2009 Development and Use of Tools to Aide in the Development of Management Strategies for Corky Root of Lettuce Carolee Bull
2009 Investigation of Tospovirus Outbreaks in California Lettuce Steven Koike, Bob Gilbertson, Yen-Wen Kuo, Tom Turini, Richard Smith
2009 Biology and Epidemiology of Verticillium Wilt of Lettuce Krishna V. Subbarao
2009 Verticillium Wilt of Spinach: Detection, Biology and Control Krishna V. Subbarao

2008 REPORTS

Year Report Name Principal Investigators
2008 Development and Use of Tools to Assist Breeding for Resistance to and Management of Bacterial Leaf Spot and Corky Root of Lettuce Carolee Bull
2008 Insect Management for Central Coast Lettuce Michael Cahn, Wai-Ki Frankie Lam
2008 Supporting Aphid Predators Through Intercrops With Alternative Prey Kent M. Daane, Nick J. Mills, Erik H. Nelson
2008 Fusarium Wilt of Lettuce: Management Through Detection, Avoidance and Disease Resistance Thomas R. Gordon
2008 Survival of Attenuated Escherichia Coli o157:h7 or Surrogate in Field-Inoculated Lettuce Linda J. Harris
2008 Lettuce Breeding, USDA-ARS R. Hayes, I. Simko, B. Mou, J. D. McCreight
2008 Survival of Generic E. Coli Under Different Irrigation Systems Steven T. Koike, Michael Cahn, Trevor Suslow
2008 Genetic Variation in Lettuce Richard W. Michelmore
2008 Breeding Crisphead and Leafy Lettuce Richard W. Michelmore, Oswaldo E. Ochoa
2008 Leaf Lettuce Breeding Richard W. Michelmore, Oswaldo E. Ochoa, María José Truco, Leah McHale
2008 Concentration and Deposition of Viable E. Coli in Airborne Particulates From Composting and Livestock Operations Patricia Millner, Trevor Suslow
2008 Springtail and Symphylans Control With Chemigation Hugh A. Smith
2008 Biology and Epidemiology of Verticillium Wilt of Lettuce Krishna V. Subbarao
2008 Epidemiology and Control of Lettuce Drop Caused by Sclerotinia Krishna V. Subbarao
2008 Assessment and Validation of Improved Methods for Irrigation Water Quality Compliance Monitoring and Detection of Escherichia Coli O157:h7 Trevor Suslow