Stripe Rust Continues To Develop In Winter Wheat Fields

Jun 08, 2015

By Emmanuel Byamukama

Heavy development in some S.D. fields

Two winter wheat fields in Gregory county were found with severe stripe rust (Figures 1 and 2). Several fields scouted along highway 18 in Turner, Hutchinson, Douglas, Charles Mix, Gregory and Tripp were found with stripe rust at low severity.

Figure 1. Severe stripe rust on winter wheat in Gregory county. Notice the yellowing of leaves due to stripe rust.

Wheat is mostly between heading and flowering, a yield determinant growth stage. With the current wet weather conditions and more rain in the forecast, stripe rust may develop to reach severe levels.

Apply fungicides to protect and prevent

A fungicide application is recommended to protect the flag leaf from stripe rust and other fungal pathogens. Several fungicides on market are effective in controlling stripe rust. For a list see the recommended fungicides publication by the NCERA 184 working group.

Figure 2. A close up of a flag leaf with heavy stripe rust pustules.

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Video: Wisconsin Corn and Soybean Weed Management Updates and Considerations for 2026 and Beyond

Dr. Rodrigo Werle, associate professor and extension weed scientist, UW–Madison, shares the latest updates and future considerations for corn and soybean weed management in Wisconsin. This presentation covers herbicide resistance trends in waterhemp, including newly confirmed cases of HPPD and S-metolachlor resistance, and emphasizes the importance of residual herbicides and strategic tank mixes for consistent control. Rodrigo also introduces upcoming technologies like Vyconic soybeans and new herbicide products, discusses integrated weed management strategies such as planting green with cover crops, and highlights practical recommendations for 2026 and beyond.

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