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United States Department of Agriculture

Agricultural Research Service

ARS Photo Library

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Image Number K9604-1

The yellow spots on this leaf are evidence of infection by the Pennsylvania isolate of plum pox virus. The leaf is from Chenopodium foetidum, an important indicator species of plum pox disease.

Photo by Scott Bauer.

640 pixels wide: (k9604-1.jpg)

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Last Modified: 5/23/2006