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Leaf blight, also called Isariopsis leaf spot ( Pseudocercospora vitis) on Redbud (Cercis canadensis)


9 Images
5405340
Paul Bachi
University of Kentucky Research and Education Center

Several leaves with large, brown blotches with yellow halos on the upper leaf surface caused by the fungus Pseudocercospora vitis.  Also on the leaves are angular tan to brown blocks of infected tissue mostly along the veins caused by the fungus Plasmopara cercidis.

5405341
Paul Bachi
University of Kentucky Research and Education Center

Several leaves with large, brown blotches with yellow halos on the lower leaf surface caused by the fungus Pseudocercospora vitis.  Also on the leaves are angular tan to brown blocks of infected tissue mostly along the veins caused by the fungus Plasmopara cercidis.

5405342
Paul Bachi
University of Kentucky Research and Education Center

A single leaf with large, brown blotches with yellow halos on the upper leaf surface caused by the fungus Pseudocercospora vitis.  Also on the leaves are angular tan to brown blocks of infected tissue mostly along the veins caused by the fungus Plasmopara cercidis.

5405343
Paul Bachi
University of Kentucky Research and Education Center

A single leaf with large, brown blotches with yellow halos on the lower leaf surface caused by the fungus Pseudocercospora vitis.  Also on the leaves are white to gray-brown blocks of infected tissue mostly along the veins caused by the fungus Plasmopara

5405344
Paul Bachi
University of Kentucky Research and Education Center

Close-up of a large, brown blotch on the upper leaf surface caused by the fungus Pseudocercospora vitis.

5405345
Paul Bachi
University of Kentucky Research and Education Center

Light shown at a steep angle to the upper leaf surface surface illuminating random tufts which are "synnemata", the spore-producing bodies of the fungus Pseudocercospora vitis.

5405346
Paul Bachi
University of Kentucky Research and Education Center

View across single spot with dark green-black "synnemata" of Pseudocercospora vitis, which are clusters of conidiophores and conidia, coming up from infected tissue.

5405347
Paul Bachi
University of Kentucky Research and Education Center

Close-up view across single spot with dark green-black "synnemata" of Pseudocercospora vitis, which are clusters of conidiophores and conidia, coming up from infected tissue.

5405348
Paul Bachi
University of Kentucky Research and Education Center

Close-up of single dark green-black "synnema" of Pseudocercospora vitis, which are clusters of conidiophores and conidia, coming up from infected tissue.