Increasing nitrogen rates can actually prove detrimental if producers don’t also take the time to apply fungicides, says Peter Johnson, cereals specialist with Ontario Ministry of Agriculture and Rural Affairs. That’s because the resulting improvements in canopy can actually increase the potential for disease development. Enter the nitrogen/fungicide duo.
“That synergy is so significant,” says Johnson, referring to the application of both additional nitrogen fertilizer and fungicide. “When we put the two together, it wasn’t one plus one equals two, it was one plus one equals 2.5 or, on some varieties, it actually equalled three.”
In this episode of the Wheat School, Johnson explains what research has shown to date, how applying fungicides can improve yields, when it’s best to apply it and what this means for nitrogen recommendations going forward.