T OP CROP MANAGER WEED MANAGEMENT WEED MANAGEMENT KNOW. GROW. MARCH 2017 • EASTERN EDITION CROP MANAGEMENT 5 | Managing glyphosate-resistant waterhemp Researchers are finding some promising options for controlling this tough weed. By Carolyn King 10 | Keeping the lid on woolly cupgrass The weed is limited to southern Quebec, but researchers continue to monitor its spread with cross-country surveys. By Carolyn King 30 | Benefits from tree-based intercropping Trees transform production on marginal land – and become a significant investment in their own right. By Julienne Isaacs 5 Waterhemp has a smooth, hairless stem, and lance-shaped leaves with a wavy margin. Photo courtesy of Peter Sikkema. 10 30 FROM THE EDITOR 4 CROP MANAGEMENT Programming plants for self-defence By Brandi Cowen Results of the winter wheat trials are more intense By Rosalie Tennison 16 Soybean trials offer key metric for comparisons By Julienne Isaacs WEED MANAGEMENT PLANT BREEDING 34 More tools for improving crop traits By Carolyn King PESTS AND DISEASES CEREALS 8 17 2017 Weed Control Guide 36 Cultural controls not a viable option By John Dietz 40 Stamping out swede midge? By Donna Fleury ON THE WEB REDUCING RUNOFF WITH ENGINEERED SPRAY DROPLETS When farmers spray their fields with pesticides or other treatments, only two per cent of the spray sticks to the plants. A significant portion of it typically bounces right off the plants, lands on the ground, and becomes part of the runoff that flows to streams and rivers, often causing serious pollution. But a team of MIT researchers aims to fix that. PHOTO BY MELANIE GONICK. ON THE COVER: Readers will find numerous references to pesticide and fertility applications, methods, timing and rates in the pages of Top Crop Manager. We encourage growers to check product registration status and consult with provincial recommendations and product labels for complete instructions. TOP CROP MANAGER east | March 2017 3 PHOTO COURTESY OF ROBERT BRADLEY. PHOTO COURTESY OF PETER SIKKEMA. PHOTO COURTESY OF ROBERT NURSE.