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United States Department of Agriculture

Agricultural Research Service

ARS Photo Library

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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: 5/23/2006
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