|
Project Leaders: Gary C. Bergstrom1, Lance E. Davidson1,
Mark E. Sorrells2, and Stewart M. Gray1,3; Departments
of Plant Pathology1 and Plant Breeding2, Cornell University;
and USDA-ARS3
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 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. It appears
that there is a broad range in virus reaction among New York-adapted cultivars.
Farmers in cultivar selection decisions should use only data summarized over
multiple years. Cultivar nurseries for 2001 evaluation were planted at both
the Trumansburg and Ithaca sites, with two dates of planting at Trumansburg.
Based on the year 2000 preliminary results, proposals have been submitted to
the NE-IPM and NE-SARE programs of USDA to secure funds for continuation of
this project.
|
