T OP CROP MANAGER PESTS AND DISEASES CROP MANAGEMENT Know. Grow. APRIL 2013 • EASTERN EdITIoN WEED MANAGEMENT 6 | Preparing for action Improving action thresholds for managing bean leaf beetle in soybean. By Carolyn King 12 | CornSmart with Ken Ferrie Management tips on a variety of crop-related issues. By Melanie Epp 20 | Ontario soybeans gain ground on GR giant ragweed Soybean growers in ontario can stay ahead of the glyphosate-resistant giant ragweed nemesis. By John Dietz 6 Photo courtesy of rob bourchier, aafc. 12 20 28 ON THE COVER: multiple knotweed psyllids Aphalara itadori sitting on a single Japanese knotweed leaf. 10 SOIL AND WATER What moves beneath your field? By Jeanine Moyer 24 WEED MANAGEMENT Sights set on Japanese knotweed By John Dietz 4 FROM THE EDITOR What’s bugging you? By Janet Kanters, Western Editor 18 PESTS AND DISEASES Corn versus late-emerging weeds By Rosalie I. Tennison ON THE WEB TEchNOLOGIcAL INNOvATION – On Feb. 25, 2013, BASF Canada and the Innovative Farmers Association of Ontario presented Mark Brock with the 2012 Innovative Farmer of the Year award for his constant promotion of innovation and leadership. www.agannex.com/production/technological-innovation 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 2013 3 Photo courtesy of Peter h. sikkema. Photo courtesy of ken ferrie. Photo by cara mccreary.