ash yellows phytoplasma
Candidatus Phytoplasma fraxini Griffiths et al. 1999

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Joseph O'Brien

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Joseph O'Brien

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William Jacobi

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William Jacobi

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USDA Forest Service - Forest Health Protection - St. Paul Archive

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USDA Forest Service - Forest Health Protection - St. Paul Archive

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USDA Forest Service - Forest Health Protection - St. Paul Archive

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USDA Forest Service - Forest Health Protection - St. Paul Archive

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USDA Forest Service - Forest Health Protection - St. Paul Archive

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USDA Forest Service - Forest Health Protection - St. Paul Archive