T OP CROP MANAGER soybean vein necrosis is a new disease, but it has already become a widespread problem in north American soybean-growing areas. Photo courtesy of Albert tenutA. Know. Grow. APRIL 2014 • EASTERN EdITIoN DisEasEs GENETiCs REsEaRCH 5 | Soybean vein necrosis Finding answers to key questions about this new disease. By Carolyn King 16 | Proactive pathogen defences Scientists are expanding their knowledge and working toward serious solutions. By Amy Petherick 26 | Bees for crop health While pollinating flowers, bees can also deliver effective crop protection products. By Carolyn King 5 16 26 Photo courtesy of trent university. Photo courtesy of Albert tenutA. 12 DisEasEs northern corn leaf blight By Treena Hein 22 OilsEEDs Canola seeking sulphur By Amy Petherick 4 FROM THE EDiTOR growing threats By Stefanie Croley Tax tips for the business owner By Paul Vaillancourt 18 on the lookout for disease threats By Melanie Epp 30 MiCRONuTRiENTs Micronutrients in corn By Blair Andrews 34 BusiNEss MaNaGEMENT ON THE WEB WhEAT NITROGEN STRATEGIES What is the right rate of nitrogen for wheat, and are there any strategies that might help get those monster yields without breaking the bank? ON THE COVER: www.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 | april 2014 3 Photo by M. Al-MAzrA’Awi.