Submitted to: Western Society of Weed Science Research Reports
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: December 31, 2009
Publication Date: March 12, 2010
Citation: Anderson, R.L. 2010. Dry Pea Improves Winter Wheat Tolerance to Rye. Western Society of Weed Science Research Reports, p.115-116. Interpretive Summary: A population-based approach to weed management can reduce the need for herbicides or tillage in crop production. One component of this approach is reducing the impact of weed interference on reducing crop yield. This study showed that the dry pea improves winter wheat tolerance to wild rye, a common weed in this crop. Yield loss due to rye interference was three-fold higher following soybean than following dry pea. Even with weed-free conditions, winter wheat yielded more following dry pea than soybean. Crop diversity has enabled producers to develop the population-based weed management. Producers can further improve weed management by emphasizing crop sequences that enhance tolerance to weeds.
Technical Abstract: This study compared the impact of soybean and dry pea on rye growth in winter wheat. Rye was established at 18 plants/m2 in marked quadrats in winter wheat; grain yield was determined by harvesting from adjacent rye-infested and rye-free quadrats. Winter wheat was most tolerant of wild rye following dry pea; yield loss due to rye interference was only 9%. In contrast, winter wheat yield loss due to wild rye was more than 30% following soybean. Winter wheat also yielded 13% more in weed-free conditions following dry pea. Producers can control weeds in crops with less herbicides by using a management system that disrupts weed population growth. Crop sequences that improve tolerance to weeds will further minimize the impact of weeds with population-based management.