1. Differential effects of spot blotch on photosynthesis and grain yield in two barley cultivars
- Author
-
Nicolás Glison, Carlos A. Pérez, Ariel J. Castro, Esteban Hoffman., Luis Viega, and Sylvia Pereyra
- Subjects
biology ,Inoculation ,food and beverages ,Growing season ,Plant Science ,Horticulture ,Cochliobolus sativus ,Photosynthesis ,biology.organism_classification ,Fungicide ,Agronomy ,Yield (wine) ,Grain yield ,Cultivar ,Agronomy and Crop Science - Abstract
Barley spot blotch (SB), caused by Cochliobolus sativus, is an important barley disease which causes extensive grain yield losses. These losses may not always correlate directly with the amount of diseased leaf area. Two barley cultivars, Quebracho (susceptible to SB) and Carumbe (with intermediate susceptibility to SB), were compared in field experiments in 2003, 2004 and 2006. Plots of each cultivar were either inoculated with C. sativus or protected with fungicide under field conditions to generate contrasting treatments: i) diseased, and ii) free of disease, respectively. SB severity over the growing season, photosynthetic rate on leaves with no visible symptoms and grain yield were assessed for each treatment and year. There was no treatment effect on cv. Carumbe, while cv. Quebracho showed a significant yield reduction, even though SB severity during the grain filling period was
- Published
- 2014