Stripe rust, nitrogen uptake & getting the most out of the spray pass | RealAg Radio | May 25, 2026

Stripe rust is returning, with impacts tied to Ontario weather patterns. Nitrogen uptake after pollination in wheat and corn raises questions about how nitrogen mineralization will affect crop performance. Red clover seeding into wheat may be too late for some situations, but spring cereal crops can still allow timely establishment. Spray efficacy and achieving the most from a spray pass require adjusting herbicide applications when conditions are not ideal. Farming progress varies by region and soil type, with some fields still waiting to dry out before seeding or field operations can proceed.

"Have you got questions about whether or not it's too late to put red clover into wheat? Well, it probably is, but if you've got a spring cereal crop, it may not be too late. In fact, you might be a little early. What about nitrogen? We've got huge questions about nitrogen on wheat, but of course, what we might expect for nitrogen mineralization and how that's going to impact a corn crop this year in Ontario."

"Depending on where you farm, you might be done seeding your planting, or there might be certain areas, certain soil types from Saskatchewan to Ontario that haven't really even turned a wheel. They've got fields that are just waiting to dry out. That's all."

"Also on today's show, Jason Sauchuk of Bayer joins to talk about how to adapt spraying plans when conditions are less than ideal."

"Today on the show, host Lyndsey Smith is joined by Peter Johnson of RealAgriculture to talk about the return of stripe rust, nitrogen and red clover in wheat."

Read at Realagriculture