Damon Smith, Extension Field Crops Pathologist, Department of Plant Pathology, University of Wisconsin-Madison
The Wisconsin Field Crops Pathology Lab scouted winter wheat variety trials located in Fond du Lac and Chilton, Wisconsin today (June 11). Stripe rust was found at both locations. At the Fond du Lac site rust was only found in a few plots, but some plants had high levels of severity on flag leaves (see image). At the Chilton site, more plots and varieties were symptomatic with stripe rust, but severity was trace or low for all plots. In one plot at Chilton, we also observed one flag leaf with trace levels of leaf rust. Wheat at both sites is in full flower.