Andres Kniss, Professor of Weed Science & Head, Dept. of Plant Sciences/ University of Wyoming presents “What’s light got to do with it? Exploring the role of plant-reflected light in crop yield loss and weed management”. Early-emerging weeds negatively affect crop yield potential, but the mechanisms by which weeds reduce crop yield are not fully understood. Yield loss is typically attributed to resource depletion by weeds. In this presentation, I will summarize several years of research on ‘shade avoidance’ responses in sugarbeet and the subsequent impacts on yield.