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Joint Meeting of the 65th Annual Conference on Soilborne Plant Pathogens & the 50th Annual Statewide California Nematology Workshop

 March 26-28, 2019

         Huntington Library, Art Collections and Botanical Gardens

1151 Oxford Road, San Marino, CA




Tuesday March 26, 2019


12:00-4:00 pm            Field trip includes box lunch and botanical garden tour


5:00-5:30 pm              Registration for Conference on Soilborne Plant Pathogens opens


5:30-7:30 pm              Social and dinner– Banta Hall



Wednesday March 27, 2019


8:00-8:30 am              Registration– Ahmanson Classroom


8:30-10:00 am            Opening Session: Soil Health and Microbial Interactions


                                        Welcome: Jim Folsom, Huntington Gardens and Timothy Paulitz, organizer


Jeffrey Mitchell, UC Davis, Kearney. A vision for soil health for California.


Daniel Schlatter, USDA-ARS, Pullman, WA. The microbial bases of soil health: inside the black box.


Howard Ferris, UC Davis. Fifty years nematology workshop: hindsight is 20/20.


10:00-10:30 am         Coffee break


10:30-noon                 Session I.  Soilborne microbial dynamics

Session Chair: Shashika Hewavitharana, Cal Poly- San Luis Obispo.  (15-minute talks below)


Soil microbiomes associated with substrate-mediated suppression of plant disease. Dan Chellemi, Agricultural Solutions.


Attacking apple replant problem with microbiome tools. Shashika Hewavitharana, Cal Poly- San Luis Obispo.


Exploring the relationships between resistance to soil-borne diseases and the rhizosphere microbiome in Strawberries. Eric Boyd, Cal Poly- San Luis Obispo.


Rapid detection of strawberry soilborne pathogens using recombinase polymerase amplification (RPA). Seyedmojtaba Mansouripour, Cal Poly- San Luis Obispo.


Synergy between Trichoderma and anaerobic soil disinfestation (ASD) to manage Rhizoctonia root rot in radish. Ram Khadka, Ohio State.


The complex of root pathogens affecting marijuana (Cannabis sativa L.) production. Zamir Punja, Simon Fraser University.


Noon-1:30 pm           Lunch – Banta Hall


1:30-3:00 pm              Session II. New developments in the realm of soilborne pathogens and pests.

                                        Session Chair: Andreas Westphal, UC Riverside- Kearney.

(15-minute talks below)


Controlling Sclerotinia sclerotiorum in Glycine max by targeting oxalic acid production using host-induced gene silencing. Megan McCaghey, UW Madison.


Avoidance, attraction and genes oh my! Using odors to identify neural circuitry and genes underlying nematode behavior. Tiffany Baiocchi, UC Riverside.


Incidents of nematode return following spot or strip pre-plant treatments. Michael McKenry, Nematologist Emeritus, UC Riverside.


Evaluation of anaerobic digestates for suppression of plant-parasitic nematodes in soil. Caroline Eberlein, UC Riverside.

Is there soil suppressiveness against plant-parasitic nematodes under changing almond production practices? Jinling Huang, UC Riverside.


Developing nematode resistant rootstocks in walnut: trials, tribulations and streamlining. Andreas Westphal, UC Riverside- Kearney.


3:00-3:30 pm              Coffee break


3:30-5:00 pm              Session III. Chemical, Biological, and cultural control of soilborne diseases.

                                        Session Chair: Kelly Ivors, Driscoll’s Global Plant Health.

(15-minute talks below)


Systems-based management of soilborne disease. Dan Chellemi, Agricultural Solutions.


Integrated solution to reduce Botryosphaeria incidence and stinkbug feeding damage on pistachio nuts. Raksha Kuenen and G. Musson, Bayer.


Nematicides 3.0. Ole Becker, UC Riverside.


Chemical nematode suppression in perennial cropping systems. Zin Thu Zar Maung, UC Riverside- Kearney.


Seed variety trial for cyst nematode resistant sugarbeet. Becky Westerdahl, UC Davis.


Brassica cover crop as potential plant-parasitic nematode suppression in nut crops. Yu-Chen Wang, UC Riverside- Kearney.


5:30-7:30 pm              Meeting  of the California Nematology Workgroup


Thursday March 28, 2019


7:30-8:00 am              Steering Committee Meeting


8:30-9:45 am              Session IV. Soilborne disease potpourri. Session Chair: Hung Doan, UC Davis. (15-minute talks below)


Demystifying Fusarium diseases of tomato. Hung Doan, UC Davis.


Exploring the effect of deficit irrigation on development of Fusarium wilt in tomato. Kelley Paugh, Johanna Del Castillo Múnera, Cassandra Swett, UC Davis.


Elucidating the effects of soil salinity on Fusarium wilt of tomato: implications for soil salinity and disease co-management. Beth Hellman, UC Davis.


Determining pathogenicity of fungal symbionts vectored by Euwallacea spp. in southern California landscape trees. Heidi Holmquist, Cal Poly- Pomona.


Impact of chemicals of emerging concern on soilborne plant pathogen Verticillium dahliae. Nathan McLain, UC Riverside.


Multiple hormonal response-pathways cooperate in host resistance against Macrophomina phaseolina. Mercedes Schroeder, UC Riverside.


9:45-10:15 am            Coffee break


10:15-11:00 am         Session V. Soilborne disease potpourri. Session Chair: Wolfgang Schweigkofler, Dominican University and NORS-DUC.

(15-minute talks below)


Assessing the incidence and diversity of Oomycete species occurring in planned restoration areas of the Angeles National Forest Sebastian Fajardo, UC Davis.


Soil remediation for the control of invasive pathogens in nurseries: experiences with Phytophthora ramorum et al. Wolfgang Schweigkofler, Dominican University of California.


Identification of Pseudomonas spp. VOCs for use in biocontrol of nematodes and fungi. Rebecca Kimmelfield and Christopher Taylor, Ohio State University



The Conference on Soilborne Plant Pathogens would like to thank our corporate sponsors for their support. Their contributions went to cover student scholarships, lunches, and food for the social.