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ARS Home Office of Communications Images Photos Apr10





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Image Number K3146-1 Plant pathologist Theodore O. Diener discovers the viroid, the smallest known agent of plant disease. His discovery is ranked among the top 10 milestones for plant pest and pathogen research by the American Phytopathological Society.  Photo by Barry Fitzgerald.  640 pixels wide: (k3146-1.jpg)   Please visit our Image Gallery


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