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United States Department of Agriculture

Agricultural Research Service

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Image Number K10856-1

Roots of potatoes treated with a systemic acquired resistance (SAR) activator are examined for disease symptoms by soil microbiologist Harold Collins (left) and geneticist Roy Navarre.

Photo by Peggy Greb.

640 pixels wide: (k10856-1.jpg)

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Last Modified: 8/13/2016
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