ARS | Publication request: Bird cherry-oat aphid resistance in barley

Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: August 1, 2012
Publication Date: October 23, 2012
Citation: Mornhinweg, D.W., Springer, T.L. 2012. Bird cherry-oat aphid resistance in barley [abstract]. ASA-CSSA-SSSA Annual Meeting Abstracts, Oct. 21-24, 2012, Cincinnati, OH, Poster No. 239-6.

Technical Abstract: Bird cherry-oat aphid, Rhopalosiphum padi L., is a serious pest of barley, Hordeum vulgare L., world-wide. It is the most efficient vector of barley yellow dwarf virus, the most important viral disease of small grains in the world. Not all bird cherry-oat aphids acquire the virus while feeding on infected plants yet yield loss has been reported with nonviruliferous bird cherry-oat aphid feeding alone. Because bird cherry-oat aphid injury is normally considered asymptomatic, screening of seedlings in the greenhouse to identify resistance has not been considered possible. A greenhouse seedling screening technique is herein proposed to identify bird cherry-oat aphid resistance in barley and a visual chlorosis rating scale of 1-5 is described. The objectives of this study were to validate this screening technique and determine if the proposed rating scale accurately predicts resistance in terms of grain yield and yield components.