Fig. 5. Experimental design and results for Washington, 2002. (A) Experimental design. Source plot was 0.6 ha, surrounded by a border of male-sterile maize 18 m wide. Receptor plots were planted at a 3-wk interval before or after the source plot. (B) Total xenia kernels from all replicates of the receptor plots at each planting interval are shown. Approximately 12.0 million kernels were evaluated.