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United States Department of Agriculture

Agricultural Research Service

ARS Photo Library

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Image Number D247-2

Technician J’Lynn Howell (right) homogenizes hydrilla samples while plant physiologist Franck Dayan observes the presence of carotenoids (the yellow layer in the test tube) that indicate the plant is herbicide resistant.

Photo by Stephen Ausmus.



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Last Modified: 5/23/2006
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