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Developing an IPM Response to a New Wheat Health Threat in New York: Wheat Soilborne Mosaic Virus 2002

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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 WSBMV 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 2000-2002 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 planted in an infested field in Trumansburg. An identical nursery was planted at Ithaca-Caldwell Field which has a history of WSSMV. Data on virus reactions of adapted cultivars were collected in 2000-2002. There is a broad range in virus reaction among New York-adapted cultivars. In cultivar selection, producers should use only data summarized over multiple years. Cultivars with high resistance to both soilborne viruses are now available to New York producers. Cultivar nurseries for 2003 evaluation were planted at both the Trumansburg and Ithaca sites.

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