Submitted to: International Plant Protection Congress
Publication Type: Abstract Only
Publication Acceptance Date: March 28, 2004
Publication Date: May 13, 2004
Citation: Porter, D.R., Mornhinweg, D.W., Burd, J.D., Huang, Y. 2004. Resistance to greenbug in barley [abstract]. In: Proceedings of the 15th International Plant Protection Congress, May 11-16, 2004, Beijing, China. p. 87. Technical Abstract: Most biotypes of the greenbug [Schizaphis graminum (Rondani)] are extremely damaging to barley (Hordeum vulgare L). However, greenbug biotype G has been reported to be unable to successfully feed on barley, and is described as the first greenbug avirulent to 'Wintermalt' barley (which is susceptible to all other greenbug biotypes). The objective of this study was to determine the pest status of greenbug biotype G in barley by characterizing the response of select barley cultivars and germplasm to greenbug biotype G feeding. Eight barley and four wheat cultivars and germplasm were challenged with biotype G and damage ratings recorded after 22 d of infestation. Barley is indeed a host of biotype G and genetic diversity exists within barley for reaction to attack by greenbug biotype G. Three barley cultivars were killed by biotype G, while five were resistant to feeding damage. These new sources of resistance to greenbug biotype G in barley should prove useful in the development of new greenbug resistant barley cultivars.