Ontario Grain Farmer April/May 2021

When managing resistance, diligence pays. Keep on top of weeds, insects, and diseases in your field and monitor conditions on a regular basis. Grain Farmers of Ontario has a number of resources and links to other resources posted in the agronomy section of www.gfo.ca . There are also a number of apps that Grain Farmers of Ontario has supported, particularly the Pest Manager app that helps identify, map, and find integrated management options for weeds, diseases, and insects (https:// gfo.ca/about/mobile-apps/) . Manage Resistance Now is also a helpful resource with videos, factsheets, and articles on common integrated pest topics https://manageresistancenow.ca/ It is imperative to keep the tools that we have to control various pests in field crops. All methods of resistance management must be applied and followed to steward the technologies that we currently have access to. Without them, in some situations there are not a lot of options. The benefits of the tools that we have available far outweigh any challenges found in trying to properly utilize them. Will we be farming the same in five or 10 years? Farmers have to do the best that they can with what they have, following integrated pest management for preservation and success on farm, now and into the future. Laura Ferrier is an agronomist with Grain Farmers of Ontario. l ONTARIO GRAIN FARMER 29 APRIL/MAY 2021 When managing resistance, diligence pays. Shieldex ® 400SC Herbicide is the latest Group 27 herbicide available for 昀eld, seed, sweet and popcorn growers. Independent research has shown that the active ingredient tolpyralate, as part of a comprehensive herbicide program, provides the most consistent control of important broadleaf and grassy weeds in corn. • Excellent control of Canada Fleabane, Waterhemp, Lamb’s Quarters, Pigweed, Green Foxtail, Barnyard Grass & much more! • A highly compatible re-cropping pro昀le following the year after application. • Good tank-mix compatibility and an excellent 昀t with atrazine Post Emergent Control of G27 Corn Herbicides 2 Weeks after Application Lambs Quarters Shieldex + Atrazine (30 + 1000g ai/ha) Armezon + Atrazine (12+ 500g ai/ha) Callisto + Atrazine (100 + 280g ai/ha) Velvet Leaf Pigweed Common Ragweed Lady’s Thumb Wild Mustard Green Foxtail Barnyard Grass 100 80 60 40 20 % CONTROL University of Guelph Ridgetown College (2015-17) KILLS THE WEEDS THAT MATTER GOWANCANADA.COM Shieldex is a registered trademark of Ishihara Sangyo Kaisha, Ltd. Always read and follow label directions.