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Sunflower Rust and N Rate (07/25/19)

There have been reports of sunflower rust in the state. In our N-rate work a few years ago, we noticed that sunflower rust increased with N rate as indicated in the following table.

There have been reports of sunflower rust in the state. In our N-rate work a few years ago, we noticed that sunflower rust increased with N rate as indicated in the following table. Using the sunflower N rate calculator, instead of the archaic yield-based formula, will help growers reduce their susceptibility to certain diseases and maximize yield and oil content. These data appear in the Agronomy Journal, 2018.

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Dave Franzen

Extension Soil Specialist

701-799-2565

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