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White sporangia and sporangiophores of Phytophthora infestans, causal agent of late blight, at the margins of necrotic potato leaf lesions. (Courtesy R.V. James) |
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White sporangia and sporangiophores of Phytophthora infestans, causal agent of late blight, at the margins of necrotic potato leaf lesions. (Courtesy R.V. James) |