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International Journal of Agronomy
Volume 2012 (2012), Article ID 635219, 9 pages
http://dx.doi.org/10.1155/2012/635219
Research Article

Relationship between Incidence of Cephalosporium Stripe and Yield Loss in Winter Wheat

1Department of Crop and Soil Science, Oregon State University, Corvallis, OR 97331, USA
2Programa Nacional de Cultivos de Secano, Instituto Nacional de InvestigaciĆ³n Agropecuaria, INIA La Estanzuela, Ruta 50 km 11, Colonia 7000, Uruguay
3Wheat Research, Limagrain Cereal Seeds, 3515 Richards Lake Road, Fort Collins, CO 80524, USA
4Department of Botany and Plant Pathology, Oregon State University, 2082 Cordley Hall, Corvallis, OR 97331-2902, USA

Received 12 October 2011; Accepted 12 December 2011

Academic Editor: Juan G. Annone

Copyright © 2012 M. C. Quincke et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Cephalosporium stripe (caused by Cephalosporium gramineum) can be a serious disease of winter wheat (Triticum aestivum L.) in the Pacific Northwest of the USA. Effects of Cephalosporium stripe on yield, test weight, protein, and kernel characteristics were examined using 12 winter wheat varieties in field plots inoculated and not inoculated with the pathogen. Averaged over varieties, inoculation decreased yield, test weight, kernel weight, and kernel diameter; grain protein and the standard deviations of kernel weight and kernel diameter were increased by inoculation. Grain yield of the susceptible check was reduced by as much as 41% with addition of inoculum. The most resistant and the most susceptible varieties performed similarly for yield in the two environments, while varieties with intermediate levels of resistance were sometimes inconsistent. There was a linear relationship between yield and % whiteheads (sterile heads caused by disease) in one environment and a curvilinear relation in the other.