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United States Department of Agriculture

Agricultural Research Service

ARS Photo Library

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ARS plant geneticist Robert Griesbach examines petunias.

Image Number K7311-1

To check elms for tolerance, geneticist Alden Townsend inoculates a tree through a small predrilled hole with Ophiostoma ulmi, the fungus that causes Dutch elm disease.

Photo by Scott Bauer

640 pixels wide: (k7311-1.jpg)

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Last Modified: 5/23/2006