Evaluating Feral Rye Competition with Wheat

In order to analyze the competition of volunteer rye (secale cerea/e) with wheat(triticum aestivum). two experiments were carried out at mashhad and gonabadagricultural research stations during the 1998-1999 growing season. in this study,wheat at 450, 460, 470, 490 and 530 plant rn and feral rye at of 10, 20, 40, and 80plants m in association with 450 wheat plants m were considered as the maintreatments, the second factor included two weed free and weedy checks. resultsindicated that volunteer rye had a higher competitive ability compared to wheat.wheat yield was significantly lower in treatments associated with rye plantscompared to pure stands of wheat. however. at a density of 20 plants m of ryeweed, no significant differences in grain as well as biological yield were observed,there were significant differences between weed free and weedy treatmentsconsidering grain yield, biological yield and yield components