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Developing an IPM Response to a New Wheat Health Threat in New York: Wheat Soilborne Mosaic Virus 2001

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Project Leader(s): Gary C. Bergstrom (Plant Pathology, Ithaca), Mark E. Sorrells (Plant Breeding, Ithaca), Stewart M. Gray (USDA-ARS, Plant Pathology, Ithaca)

Cooperator(s): Lance Davidson (Graduate Student, Plant Pathology, Ithaca); Mark Ochs (Consultant-Certified Crop Advisor, Trumansburg); Bruce Austic (Grain Producer, Trumansburg); Janice Degni (CCE Field Crops Specialist, Cortland); Michael Stanyard (CCE Field Crops Specialist, Newark); Stan Kawamoto (Research Support Specialist, Plant Pathology, Ithaca).

Type of grant: Pest-resistant crops

Project location(s): Throughout the Northeast

Abstract: Soil infestation by a new virus, wheat soilborne mosaic virus (WSBMV), was recently confirmed in a localized area of the Finger Lakes region. The virus has the potential to reduce significantly the yield of New York winter wheat. A NYS-IPM supported project was initiated in 2000 with objectives to assess the current range of occurrence of WSBMV in New York, to assess its effect on wheat yield, and to identify adapted winter wheat varieties that are resistant to both SBWMV and wheat spindle streak mosaic virus (WSSMV), another soilborne virus that commonly infects New York wheat. Through cooperative survey with extension educators and seed industry personnel, WSBMV was confirmed during 2000 and 2001 in Cayuga, Schuyler, Seneca, Steuben, and Tompkins Counties on the wheat cultivars Harus, Marilee, Pioneer 25W33, and Caledonia. A WSBMV winter wheat cultivar nursery was established in an infested field in Trumansburg. An identical nursery was planted at Ithaca-Caldwell Field which has a history of WSSMV. Preliminary data on virus reactions of adapted cultivars were collected in 2000 and 2001. It appears that there is a broad range in virus reaction among New York-adapted cultivars. In cultivar selection, farmers should use only data summarized over multiple years. Cultivar nurseries for 2002 evaluation were planted at both the Trumansburg and Ithaca sites. Based on the 2000 and 2001 preliminary results, a proposal has been submitted to the NE-SARE program of USDA to secure funds for continuation of this project.