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2006 U.S. Oat Crown Rust Race Survey Results and Virulence Analysis

This report presents the findings of the 2006 U.S. Oat Crown Rust Race Survey conducted by M.L. Carson and G. Ochocki at the USDA Cereal Disease Lab in St. Paul, MN. It includes a comprehensive assessment of virulence in winter and spring oat regions, revealing winter oats had an average virulence of 15.5 (range 3-20) while spring oats had 14.8 (range 2-23). Notably, only three Avena accessions were found to be crown rust free: AC Leggett (Pc68 & Pc94), PI 258731 (WIR 5201; A. strigosa), and A. murphyii P12.

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2006 U.S. Oat Crown Rust Race Survey Results and Virulence Analysis

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  1. 2006 U.S. Oat Crown Rust Race Survey M.L. Carson and G. Ochocki, USDA Cereal Disease Lab St. Paul, MN

  2. Winter Oat Region Ave. virulence 15.5 (out of 28) Range 3-20 Spring Oat Region Ave. virulence 14.8 Range 2-23 Mean Virulence - 2006

  3. St. Paul Buckthorn Nursery 2006 • Only three Avena accessions were crown rust free • AC Leggett (Pc68 & Pc94) • PI 258731 (WIR 5201; A. strigosa) • A. murphyii P12

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