Figure 21. (A) An approved ELISA-based seed health test can be used to detect Erwinia stewartii in corn seed. Four 100-kernel samples of seed are soaked in a buffer solution and blended before samples are tested for E. stewartii with an enzyme-linked immunosorbent assay (ELISA). (B) Seed samples that harbor E. stewartii are detected by causing a change in color of solutions in ELISA plate wells. (Courtesy J.K. Pataky) BACK