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Pythium ultimum var. ultimum. (A) Pre‐emergence damping‐off in okra, resulting in the death of most plants at the front of the row. At the back, disease was controlled using metalaxyl. (B) Terminal hyphal swellings; bar, 10 μm. (C) Oospore within oogonium; bar, 10 μm. Images adapted from Kida et al. (2006) with permission.
