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United States Department of Agriculture

Agricultural Research Service


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Image Number D650-1

Plant pathologist Stewart Gray prepares to microinject a virus into an aphid to determine which insect tissues are not able to recognize the virus, thereby preventing the aphid from transmitting the virus.

Photo by Peggy Greb.



640 pixels wide: (d650-1.jpg)




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Last Modified: 8/13/2016
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