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History of microbiology (view source)

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| align="RIGHT" nowrap | 1884

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| Thomas J. ~~Burrillpioneered~~ the field of plant pathology. Discovers "fire blight"of fruit trees is caused by a bacterium.

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| Thomas J. Burrill pioneered the field of plant pathology. Discovers "fire blight" of fruit trees is caused by a bacterium.

|- valign="TOP"

| align="RIGHT" nowrap | 1884

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| Erwin F. Smith , another pioneer plant pathologist, discovers "peach yellows" is caused by a virus.

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| Erwin F. Smith, another pioneer plant pathologist, discovers "peach yellows" is caused by a virus.

|- valign="TOP"

| align="RIGHT" nowrap | 1885

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