Figure 2. Effect of fungicide timing on the development of tar spot on the ear leaf (EL) and the two leaves above and below the ear leaf (EL±2). Timing treatments included V7, V9, V10, tassel/silk (VT/R1), blister (R2), and a two-fungicide application program made at V7 followed by VT. AUDPC = by area under disease progress curve. Tar spot first detected in trial on 13 July.