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United States Department of Agriculture

Agricultural Research Service

ARS Photo Library

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Image Number K11321-14

Morning dew on a yellow starthistle leaf. Evening inoculations with rust spores (from Puccinia jaceae var. solstitialis) are made to catch the overnight dew needed for spore germination and infection.

Photo by Stephen Ausmus.



640 pixels wide: (k11321-14.jpg)




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Last Modified: 5/23/2006
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