New rust ratings likely to change in season

摘要

Rust resistance ratings on the new HGCA Recommended List are liable to change once varietal testing of new races is completed. The new races detected last season did not necessarily infect Recommended List trial plots, leaving HGCA unable to fully update its ratings. Instead, the resistance scores should be treated as a holding position, and growers should read carefully the footnotes on the List for the varieties most likely to be affected.