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United States Department of Agriculture

Agricultural Research Service

ARS Photo Library

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Image Number K9986-1

To kill parasite-harboring snails, fishery biologist Andrew Mitchell and maintenance worker Robert Ideker (driving tractor) apply a solution of copper sulfate and citric acid along the shoreline of an experimental catfish pond.

Photo by Jonathan House.



640 pixels wide: (k9986-1.jpg)




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Last Modified: 5/23/2006
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