Effect of wild oat (Avena ludoviciana L.) plant density on grain yield and yield components in three bread wheat cultivars

To Study the effect of different plant densities of wild oat (Avena ludoviciana L.) on grain yield and yield components in three wheat (Triticum aestivum L.) cultivars, a field experiment was conducted as split plot in randomized complete block design with three replications in 2007-2008 cropping seasons in Mehran, Iran. The main plots were three cultivars (Chamran,Vee/Nac and Dez), and sub-plots were wild oat plant densities (0, 25, 50 and 75 plant.m-2). Results showed that wild oat plant density had significant effect on wheat grain yield and yield components. Increasing wild oat plant density from zero to 75 plant.m-2, grain yield of wheat reduced from 4786 to 4349 kg.ha1. Vee/Nac had higher grain yield in high plant density of wild oat as compared with Chamran and Dez. Results of this experiment showed that Vee/Nac cultivar may perform better grain yield under wild oat infection.