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United States Department of Agriculture

Agricultural Research Service

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Location: Crops Pathology and Genetics Research

Project Number: 0500-00044-030-12-S
Project Type: Non-Assistance Cooperative Agreement

Start Date: Sep 20, 2012
End Date: Dec 31, 2013

1. Assess incidence and statewide distribution of soilborne pathogens emerging in California strawberry fields grown without MB. 2. Facilitate evaluations of treatments or strategies for control of soilborne pathogens emerging in California strawberry fields grown without MB. 3. Contribute summaries of project findings to PAW-MBA educational outreach efforts.

Objective 1. The investigators will assess incidence and statewide distribution of the emerging pathogens by performing diagnostics on diseased strawberry plant specimens from fruiting fields and nurseries treated with MB alternatives. The samples will be collected from growers, pest control advisors, and UC Farm Advisors. A database will be used to document sample information, i.e., crop history, pre- and post-plant treatments pertaining to soilborne disease, disease symptoms, geographical location, etc. Pathogens will be detected and identified using culture-based and culture-independent (i.e., PCR-based) diagnostics, as appropriate. Objective 2. The investigators will facilitate evaluations of treatments or strategies for managing the emerging soilborne pathogens by partnering with general horticulturists, plant breeders, and other plant pathologists. For example, the investigators may provide pathology support (i.e., pathogen isolates, inoculum, diagnostic plant pathogen assays, etc.) to strawberry plant breeders evaluating genetic resistance to the emerging pathogens, and they may contribute diagnostic expertise that will be critical for field assessment of soil or plant treatments (i.e., alternative fumigants, fungicides, non-fumigant treatments) designed to manage the emerging pathogens. Further development of accurate soil assays for M. phaseolina and F. oxysporum f. sp. fragariae also may be undertaken. Objective 3. The investigators will work collaboratively to prepare annual analyses and summaries of the assessments described above (Objectives 1, 2). The information will be prepared and submitted by the investigators for inclusion on the PAW-MBA website and for presentation in county-based UC Extension meetings and newsletters. Field demonstrations will be held for selected trials, as appropriate. The investigators will collaborate with UC Farm Advisors in outreach efforts designed to foster awareness and optimal management of the emerging pathogens.

Last Modified: 10/15/2017
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