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If you are interested in giving a talk, contact Kelly Ivors

The following is the tentative schedule and agenda. As we solicit talks, we will add them to the agenda

              The 67th Annual Conference on Soilborne Plant Pathogens


                    The 52nd California Nematology Workshop


                                               March 23-24, 2022






Wednesday March 23, 2022


7:30-7:45 am              Practice for presenters.  Presenters will be sent a separate zoom meeting link.


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; there will be a Zoom link for the main meeting both days for everyone else. Links to be provided at a later date.


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


8:15-9:15 am              Session Moderator: Timothy Paulitz, USDA-ARS, Pullman, WA

Keynote talk regarding career retrospectives of soilborne pathogens

Krishna Subbarao. UC Davis. Successes and Failures in our Understanding and Management of Soilborne Pathogens.

9:15-10:45 am           Session I.

Session Chair: Peter Henry, USDA-ARS, Salinas. (15-minute talks below)

How does soil health management impact survival of soilborne plant pathogens? Kelley Paugh, UC Davis.

Avirulence of Fusarium oxysporum f. sp. fragariae race 1 in strawberry cultivars with FW1 resistance is mediated by Secreted in xylem (SIX) 6 gene. Christine Jade Ermita, UC Davis.

Are there host-specific mechanisms that promote Ralstonia fitness inside diverse plant hosts? Nathalie Aoun, UC Davis.

Nematodes associated with Asian vegetables in Central Florida with the focus on molecular identification of Meloidogyne species. Hung Xuan Bui, University of Florida.

Mitigation of Pacific shoot-gall disease in California putting greens. J.O. Becker and J. Baird, UC Riverside.

Synthetic microbial consortia protect wheat against a soilborne fungal pathogen. Chuntao Yin, USDA-ARS, Brookings.


10:45-11:00 am         Break

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

Tim Paulitz and JP Dundore-Arias will announce the winners of the student competition (5 minutes).

Integration of differential soybean resistance into Sclerotinia sclerotiorum apothecial risk prediction models. Richard Webster, University of Wisconsin.

An integrated approach for controlling Verticillium wilt in strawberry. Jack Koster, Cal Poly- San Luis Obispo.

Influence of temperature and soil moisture on germination of sclerotia of soil borne fungus Athelia rolfsii and application of a hydrothermal time model to predict sclerotia germination. Santosh Sanjel, University of Florida.

Spatiotemporal dynamics of Fusarium oxysporum f. sp. vasinfectum race 4 in field and growth chamber experiments. Roy Davis II, Texas A&M.

Using wild peanut to improve stem rot resistance in cultivated peanut starting from resistance identification in allotetraploid peanuts. Yun-Ching Tsai, University of Georgia.

Management of Phytophthora nicotianae in boxwood using biofumigation approaches. Sandhya Neupane, Tennessee State University.

Impact of a select set of chemical contaminates found in recycled wastewater on soilborne plant pathogens. Nathan McLain, UC Riverside.

Host plant resistance for management of Macrophomina crown rot in California strawberry. Yu-Chen Wang, Cal Poly- San Luis Obispo.

Survey of late-season soilborne pathogens of strawberry in Watsonville-Salinas, California. Mary Steele, Cal Poly- San Luis Obispo.


3:00-5:00 pm              Meeting of the California Nematology Workgroup (separate meeting; optional). via ZOOM. Link to be provided at a later date.


Thursday March 24, 2022

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. Zoom link for the main meeting both days for everyone else. Links to be provided at a later date.

8:05-8:15 am              Gerald Holmes. Cal Poly Strawberry Center Overview. Cal Poly, San Luis Obispo.

8:15-9:15 am              Session Moderator: Andreas Westphal, UC Riverside- Parlier.

Keynote talk regarding career retrospectives of soilborne pathogens.

Joe Noling, University of Florida. Lifetime achievements and nematode management considerations for Florida growers farming subtropical fine sands.


9:15-10:45 am           Session III. Chemical, Biological, and cultural control of soilborne diseases. Session Chair: Kelley Paugh, UC Davis. (15-minute talks below)

Looking at different approaches to limit the spread of soilborne plant pathogens in nurseries. Wolfgang Schweigkofler, Dominican University of California.

Greenhouse pathology in California: disease management and diagnostics in vegetable seedlings and ornamental crops. Johanna Del Castillo Múnera, UC Riverside.

Effects of water scarcity-driven irrigation practices on disease management in California processing tomato. Justine Beaulieu, UC Davis.

Plant disease management of castor Fusarium wilt complex. Shalini Yerukala, UT Knoxville.

The long-term efforts to develop improved walnut rootstocks. Andreas Westphal, UC Riverside.

Field evaluation of transgenic Easter lily bulbs for management of lesion nematode, Pratylenchus penetrans. Becky Westerdahl, UC Davis.

(5 min talk) Can we predict cyst nematode suppression in a soil? James Borneman, UC Riverside.


10:45-11:00 am         Break

11:00-1:15 pm Session IV. Soilborne Strawberry Diseases. Session Chairs: Gerald Holmes and Shashika Hewavitharana, Cal Poly, San Luis Obispo.,  (15-minute talks below)


Biology and management of Phytophthora diseases of strawberry. Marcus Marin, University of Florida.

Enhanced detection of Fusarium oxysporum f. sp. fragariae and evaluation of survival of DNA of major soil-borne pathogens after fumigation. Mike Matson, USDA-ARS Salinas.

A multilocus sequence typing assay for improved identification of Fusarium oxysporum strains. Ningxiao Li, UC Davis.

Effect of soil inoculum density of Fusarium oxysporum f. sp. fragariae and Macrophomina phaseolina on development of Fusarium wilt and charcoal rot. Akif Eskalen, UC Davis.

 Integrated management of Fusarium wilt in organic strawberries. Joji Muromoto, UC Santa Cruz.

Site-specific fumigation strategy for strawberry. Frank Martin, USDA-ARS Salinas.

The outlook for non-fumigant methods to control strawberry disease caused by Macrophomina phaseolina. Peter Henry, USDA-ARS Salinas.

Biology and management of Macrophomina on Florida strawberry. Natalia Peres, University of Florida.

Influence of root or crown inoculation on Macrophomina phaseolina colonization of strawberry. Lindsey Pedroncelli, UC Riverside.

Summary of chemigation trials for control of Macrophomina crown rot. Gerald Holmes, Cal Poly- San Luis Obispo.

Conventional and organic input testing for Fusarium and Macrophomina suppression. David Holden, Holden Research & Consulting.

The effect of fumigation on soil microbiome and suppression of Verticillium wilt in strawberry. Shashika Hewavitharana, Cal Poly- San Luis Obispo.



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.