Wheat plants, regardless of their overall response to the stripe rust fungus (resistant or susceptible), do not develop resistance to the stripe rust fungus until they reach “adult” stages. Therefore, all wheat varieties at the tillering growth stages are susceptible to the fungus. However, it is not known at what specific growth stage the adult plant resistance is expressed. For more information regarding specific wheat growth stages see: http://www.mississippi-crops.com/2014/03/20/identifying-wheat-growth-stages-using-the-feekes-scale/. Based on research conducted at other universities, stripe rust infection at the tillering stages can negatively affect yield performance. Fungicide application, even during tillering stages can reduce the overall potential yield loss as a result of winter stripe rust infection (if the disease is present in a field). Triazole products will provide a benefit in fields where infection centers (hot spots) are identified. However, keep in mind that many of the products that can be applied to wheat have strict label restrictions with regards to the number of applications and total fl oz/A that can be applied in a single season (e.g., propiconazole (8 fl oz/A total/season), tebuconazole (4 fl oz/a total/season)). For more information regarding the specific products that contain tebuconazole as well as the label restriction visit: http://www.mississippi-crops.com/2013/04/02/important-notice-tebuconazole-label-restrictions-in-wheat/. Product selection and application should be based on the presence of stripe rust in a wheat field, overall yield potential of the field, and product availability. Keep in mind that numerous generic products that contain triazole active ingredients are likely available and can help save a tremendous amount of application cost. Also be mindful, a fungicide application does not “make” the wheat crop. Do not skip some of the more important management practices when growing your wheat crop and expect the fungicide to “rescue” the crop at the end of the day.