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The 62nd Annual Conference on Soilborne Plant Pathogens

and the 48th California Nematology Workshop


March 22-24, 2016

Kearney Agricultural Research and Extension Center





Tuesday March 22.

48th Annual California Nematology Workshop

8:00 – 8:30         Registration

8:30 – 9:00         Welcome

“Cultural management strategies for nematode pests in perennials” Andreas  Westphal,  UC Riverside, Dept. Nematology, KARE, Parlier, CA

9:00 – 9:30        “Nematode control options in perennials” Becky Westerdahl, UC Davis, Dept. Entomology and Nematology, Davis, CA

9:30 – 10:00     “Strategies for Soil Fumigation: Emission Reduction, Nematode Control, and Crop Response” Suduan Gao, USDA-­‐ARS, Parlier, CA

10:00 -­‐ 10:30    Coffee break

10:30-­‐11:00        Novel tools in mitigating nematode damage in annual crops. Ole Becker, UC Riverside, Dept. Nematology, Riverside, CA

11:00-­‐11:30    Cultural control of plant-­‐parasitic nematodes in annual crops. Antoon Ploeg, UC Riverside, Dept. Nematology, Riverside, CA

11:30-­‐12:00        AF 36 for displacement of toxigenic Aspergillus to reduce aflatoxins. Themis Michailides, UC Davis, Dept. Plant Pathology, KARE, Parlier, CA

12:00 – 1:00       Lunch break

1:00 – 3:30         Field tour of the facilities at Parlier.  ALL CONFERENCE ATTENDEES ARE INVITED!

CEU credits have been applied for. To receive a box lunch and to participate in the field tour, a RSVP by March 10, and remittance of $30 are required.  When you register on, you can check the box for the field trip and you will be registered.

3:30-5:00    [Continuance of the] California Nematology Workshop

5:00-5:30   Registration

5:30-8:30    Social/Dinner


Wednesday March 23.


8:00-8:30 Registration

8:30-10:00   Opening Session

Robert Curtis ABC: Welcome

Mike Stanghellini, Tri-Cal.   The Future of Fumigation

Mark Mazzola, USDA-ARS, Wenatchee, WA. Manipulation of the soil microbiome for enhanced system resistance to pathogen proliferation

10:00-10:30     Coffee Break

10:30-12:00      Session 1. Discoveries and developments in the realm of soilborne pathogens, pests and diseases, Part 1. Session Chair:  James Gerik, USDA-ARS:

Does glyphosate (Roundup) have an impact on soil microbial communities in wheat? Tim Paulitz, USDA-ARS Pullman.

Examples of ‘Starve & Switch’ instead of fumigation when replanting Vitis, Prunus or Juglans. Michael McKenry (emeritus), University of California Cooperative Extension.

There is no nematode problem in pistachio – or is there? Andreas Westphal, T. Buzo, S. Anwar, Z. Maung, M. McKenry.

12:00-1:30        Lunch

1:30- 3:00          Session 2: Discoveries and developments in the realm of soilborne pathogens, pests and diseases, Part 2. Session Chair: Steve Koike, University of California Cooperative Extension:

Plectosphaerella cucumerina and Setophoma sp.: Discovery and characterization of two new pathogens of winter squash in the Willamette Valley, Oregon. Hannah Rivedal, Oregon State University.

Effect of foliar fertilization with zinc, manganese and iron on severity of pokkah boeng disease, cane yield and quality of sugarcane juice under field conditions. Abdel Razik Elnashar, Assiut University, Egypt.

Non-fumigant approaches for management of Almond Replant Disease. Greg Browne, University of California, Davis.

NIMITZ for managing nematodes. Issa Qandah, Adama.

3:00-3:30           Coffee Break

3:30-5:00           Session 3: Chemical, biological, and cultural control of soilborne diseases.    Session Chair: Kelly Ivors, California Polytechnic State University:; moderated by Mel Carter, Cal Poly San Luis Obispo.

Cultivar resistance plus flat fumigation for control of Verticillium wilt in strawberry. Gerald Holmes and Ryan Brantley, Cal Poly State University.

Anaerobic soil disinfestation in southern California. Oleg Daugovish, University of California Cooperative Extension.

Influence of carbon source on anaerobic soil disinfestation efficacy: The search for a rice bran alternative. Sebastian Albu and Dan Kluepfel, University of California, Davis.

Investigating approaches for the control of the soilborne strawberry pathogens Macrophomina phaseolina and Fusarium oxysporum f. sp. fragariae. Mel Carter and Kelly Ivors, Cal Poly State University.

Managing root-knot nematode (Meloidogyne incognita) on strawberries in California. Becky Westerdahl, University of California, Davis.

Novel genetic resources for breeding root-knot nematode resistant cowpea cultivars. Arsenio Ndeve, University of California, Riverside.

5:00                    Adjourn

Dinner on your own- list of local restaurants will be provided at the meeting


Thursday March 24.


7:00-8:00          Steering Committee Meeting, Room:

8:30-10:00        Session 4.  Soilborne oomycete diseases. Session Chair:  Kathy Kosta, California Department of Food and Agriculture:

Commonly produced nursery plants acceptable for use as buffer plants to separate large blocks of Phytophthora ramorum High Risk plants, to prevent spread of disease from block to block. Karen Suslow, National Ornamental Research Site- Dominican University of California (NORS-DUC).

Monitoring using a sentinel plant system reveals very limited aerial spread of Phytophthora ramorum from infected ornamental plants. Wolfgang Schweigkofler, National Ornamental Research Site- Dominican University of California (NORS-DUC).

Phytophthoras in nurseries and forests: Why the concern? Susan Frankel, US Forest Service, Pacific Southwest Research Station.

Can phosphite treatments limit spread of root rot caused by Phytophthora cinnamomi in habitat of Ione manzanita? Ted Swiecki, Phytosphere Research.

Phytophthora species from restoration plantings, high use wildland areas, and nursery production before and after management change in the San Francisco bay area; an early look. Laura Sims, Forest Pathology and Mycology, UC Berkeley.

Transplanted native Californian flora in restoration sites are highly infested with Phytophthora. Tyler Bourret, University of California, Davis.

10:00-10:30      Coffee break

10:30-12:00      Session 5: The impact of drought on soilborne pathogens and pests.  Talk and open discussion. Session Chair: Tim Paulitz, USDA-ARS Pullman, WA:

Predisposing abiotic stress in plant disease. Richard M Bostock, University of California, Davis.


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.

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