Skip to main content Skip to navigation




           The 66th Annual Conference on Soilborne Plant Pathogens

                and The 51st California Nematology Workshop


                     Tuesday March 23 – Wednesday March 24, 2021





Tuesday March 23, 2021


7:30-8:00 am              Practice for presenters.  Presenters will be sent a separate zoom meeting link.


8:00-8:15 am              Opening Remarks: Tim Paulitz


8:15-9:00 am              Keynote Talk: Career Retrospectives of Soilborne Pathogens

Thomas Gordon, UC Davis. Fusarium oxysporum: Where it comes from and what it does.


9:00-10:45 am           Session I. Session Chair: Kelley Paugh, UC Davis. (six 15-minute talks below)


Fusarium avenaceum colonization of wild oat (Avena fatua L.) caryopses induces proteome-wide defense responses in the pathogen and host. Patricia Okubara, USDA-ARS.


Evaluating resistance-based management strategies for Fusarium falciforme, an emerging vine decline pathogen of California processing tomato. Alyssa Brackrog, UC Davis.


Soil quantification of Fusarium oxysporum f. sp. vasinfectum race 4 and infection response in cotton cultivars. Jennifer Chagoya, Texas A&M.


Screening cotton cultivars for resistance to Fusarium wilt disease. Jessica Dotray, Texas A&M.


Effect of rotation crop on survival of Fusarium oxysporum f. sp. lycopersici and development of Fusarium wilt in tomato. Kelley Paugh, UC Davis.


Root-knot nematode management in a pepper-squash plasticulture system using fumigant and non-fumigant nematicides. Chinaza Nnamdi, University of Georgia.

5 MIN LIGHTNING TALK. Nematicide use-decline: Exploring the past to understand the present. Ole Becker, UC Riverside.


Brief discussion (10-minutes)


10:45-11:00 am         Break


11:00 am-1:20 pm    Session II. STUDENT PRESENTATIONS. Session Chair: JP Dundore-Arias, CSU Monterey Bay. (eight 15-minute talks below)


Tim Paulitz will announce the winners of the student competition (5 minutes).


Wheat rhizosphere bacteriome reveals genotype-specific recruitment and suppression against Rhizoctonia solani AG8. Christine Dilla-Ermita, Washington State University.


Identifying inoculum reservoirs for Ceratocystis fimbriata in sweetpotato production systems. Madison Stahr, NC State University.


The role of irrigation in disease development and management of Macrophomina charcoal rot on strawberries. Lindsey Pedroncelli, UC Riverside.


Influence of spatial planting arrangement of winter rye cover crop on corn seedling disease and corn productivity. Sarah Kurtz, Iowa State University.

Evaluating the spatiotemporal dynamics of soilborne Fusarium oxysporum f. sp. vasinfectum race 4 inoculum. Roy Davis, Texas A&M.


Comparison of egg hatching rates of Meloidogyne species and screening of soybean germplasm for resistance to M. enterolobii. Tanner Schwarz, NC State University.


Understanding soil fungus-soybean cyst nematode egg interactions through microscopic and transcriptomic examinations. Dong-gyu Kim, University of Minnesota.


Pyramiding cover crop rotation of sunn hemp or rye with tillage practices for suppression of plant parasitic nematodes, fungal soilborne diseases and weeds in a bare-ground vegetable production system. Josiah Marquez, University of Georgia.


5 MIN LIGHTNING TALK. Mining the mycobiome of the soybean cyst nematode for biological control. Kathryn Bushley, University of Minnesota.


Brief discussion (10-minutes)


:00-5:00 pm             Meeting of the California Nematology Workgroup (separate meeting; optional). M\Zoom meeting link: Meeting ID: 978 3291 6071 Passcode: 888515


Wednesday March 24, 2021


7:45-8:00 am              Please click the meeting link so you can open up zoom and troubleshoot any issues before the event starts. We plan on starting promptly at 8 am. Presenters will be sent a separate link.


8:00-8:45 am              Keynote Talk: Career Retrospectives of Soilborne Pathogens

Becky Westerdahl, UC Davis. From Temik to transgenic: A nematological


8:45-10:45 am            Session III. Session Chair: Andreas Westphal, UC Riverside- Parlier.   (Seven 15-minute talks below)


Host status of selected vegetable crops for a California Meloidogyne floridensis population. Antoon Ploeg, UC Riverside.


The host-specific impact of root exudates on virulence of potato cyst nematode, Globodera pallida. Joanna Kud, University of Idaho.


Use of remote sensing technology to evaluate the effectiveness of different fungicides to manage Phomopsis stem canker of sunflower. Ruchika Kashyap, South Dakota State University.


Effects of fumigants and biofumigants on replant disease of American ginseng (Panax quinquefolius L.). Amy Fang Shi, University of Guelph.


Impact of acetaminophen on soil borne plant pathogens in soils containing Solanum melongena. Nathan McLain, UC Riverside.


Novel species of actinobacteria isolated from acid forest soil with high activity against fungal phytopathogens. Magdalena Świecimska, Nicolaus Copernicus University, Toruń.


Bacteria and fungi that correlate with Huanglongbing (HLB) tolerance in Florida. James Borneman, UC Riverside.


5 MIN LIGHTNING TALK. Our fourth prune springtime without replant problems, bacterial canker or fumigants. Michael McKenry, UC Riverside emeritus.


Brief discussion (10-minutes)


10:45-11:00 am         Break


11:00-1:15 pm            Session IV. Session Chair: Peter Henry, USDA-ARS, Salinas. (eight 15-minute talks below)


Genomic diversity of Agrobacterium tumefaciens strains isolated from walnut orchards in California. Amisha Poret-Peterson, USDA-ARS.


Novel and available genetics to manage soilborne pathogens using grafted vegetable plants. Frank Louws, NC State University.


Biochar induced bacterial and fungal microbiome promotes plant growth and mediates systemic resistance in tomato against soilborne disease. Amit Jaiswal, Purdue University.


Root rot mitigation in pulse crops. Carmen Murphy, Montana State University.


The impacts of biofungicides on Pythium species and their associated microbiome in the soil. Emma Gachomo, UC Riverside.


Leveraging comparative genomics to develop Methylobacterium spp.  biocontrol products for Pythium spp. and Fusarium virguliforme in soy. Allison Jack, NewLeaf Symbiotics.


The unknown relationship between potato mop-top virus and its soil-borne vector. Jennifer Rushton, Colorado State University.


Soil-borne disease diagnosis and management: recent advances and future directions. Kandiah Pakeerathan, University of Jaffna.


5 MIN LIGHTNING TALK. Effect of 6-Methoxy-2-benzoxazolinone on Pythium species and corn seedling growth and disease. Jyotsna Acharya, Iowa State University.


Brief discussion (10-minutes)

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.