T OP CROP MANAGER PLANT BREEDING CANOLA The aboveground symptoms of soybean cyst nematode include yellowed patches in a field. Photo courtesy of Sam Markell, North Dakota State University. Know. Grow. DECEMBER 2015 • EASTERN EDiTioN MICRONUTRIENTS 5 | Resisting soybean cyst nematode Bringing new sources of soybean cyst nematode resistance into ontario soybeans. By Carolyn King 10 | Cashing in on canola Developing nutrient best-management practices for successfully growing canola in eastern Canada. By Trudy Kelly Forsythe 24 | Managing micronutrients Choosing the best products for your crop. By John Dietz 5 PhoTo coUrTeSy of AlberT TeNUTA, oMAfrA. 10 24 PhoTo coUrTeSy of AAfc. PLANT BREEDING 8 WEED MANAGEMENT rnai: The future of pest control By Julienne Isaacs By Treena Hein By Julienne Isaacs 12 Controlling giant ragweed in field crops By Helen Lammers-Helps MARKETS 26 Canada broadens global wheat markets By Julienne Isaacs Something to be proud of By Stefanie Croley, editor 14 Barley breeding update 16 Developing stronger soybeans PESTS AND DISEASES 20 Soybean cyst nematode in dry beans By Carolyn King FROM THE EDITOR 4 ON THE WEB ONTARIO fARmERS PuT ENvIRONmENT fIRST IN CROP IRRIGATION After experiencing drought-like growing conditions in 2012 and watching regions in the United States deal with severe water restrictions, Ontario agricultural researchers are working to find new cropping methods to use water as efficiently as possible. ON THE COVER: AgAnnex.com 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 | December 2015 3 PhoTo by JohN DieTz.