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Symptoms in maize leaves after inoculation with the two predominant Bipolaris species: B. maydis and B. zeicola. (a–c): different symptoms at 7 days after inoculation with B. maydis, each representing weak (a), moderate (b), and high (c) virulence; (d–f): different symptoms at 7 days after inoculation with B. zeicola, each representing weak (d), moderate (e), and high (f) virulence.
