By Blake Jackson
Wisconsin has confirmed its first case of stripe rust in 2025. The fungal disease was detected on the susceptible wheat variety Kaskaskia at the Arlington Agricultural Research Station. This wheat is currently in the Feekes 10.4 stage, meaning its heads are about three-quarters emerged. Fungicide will be applied once the crop reaches Feekes 10.5.1, which is the start of flowering, also called anthesis.
Stripe rust is a serious concern for wheat growers. It spreads quickly under certain weather conditions, especially when temperatures are cool—around 50 to 60 degrees Fahrenheit—and when there is high humidity or extended wet periods from rain or dew. These conditions have been present across Wisconsin recently, increasing the risk for stripe rust outbreaks.
As the wheat crop in many parts of the state is now approaching heading and flowering stages, farmers are advised to scout their fields regularly. Early detection is important to protect yields and quality. If stripe rust is found, timely fungicide application can help reduce damage.
Using resistant varieties, such as those not known to be susceptible like Kaskaskia, is also a helpful management strategy. However, weather conditions can still influence the disease’s spread, even in less vulnerable crops.
It is important for growers to stay updated with their local agricultural extension services and research stations for alerts and treatment recommendations. Applying fungicides at the correct growth stage maximizes effectiveness and protects the developing grain.
In summary, stripe rust has arrived in Wisconsin for the 2025 season. With favourable conditions for the disease, now is the time for farmers to inspect their fields, especially as heading and flowering progress. Timely action can help minimize losses.
Photo Credit: stripe-rust-omafra
Categories: Wisconsin, Crops, Wheat