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Cedar/Apple rust (Gymnosprangium juniperi-virginianae) on Apple (Malus X domestica)


8 Images
5368929
Paul Bachi
University of Kentucky Research and Education Center

The spots on the top surface of the leaves are due to spores coming from cedar trees - the fungal stage at the bottom surface of the leaf opposite the same spot is the stage which produces spores which infect cedar trees.

5368930
Paul Bachi
University of Kentucky Research and Education Center

The spots on the top surface of the leaves are due to spores coming from cedar trees - the fungal stage at the bottom surface of the leaf opposite the same spot is the stage which produces spores which infect cedar trees.

5368931
Paul Bachi
University of Kentucky Research and Education Center

Small, dark spore-producing bodies called "pycnia" on the upper surface of infected spots.

5368932
Paul Bachi
University of Kentucky Research and Education Center

Spore-producing bodies called "aecia" on the lower surface of infected spots.

5368593
Paul Bachi
University of Kentucky Research and Education Center

The size of the spots is in relation to how many spots are on the leaf.

5368594
Paul Bachi
University of Kentucky Research and Education Center

The size of the spots is in relation to how many spots are on the leaf.

5368595
Paul Bachi
University of Kentucky Research and Education Center

The size of the spots is in relation to how many spots are on the leaf.

5368596
Paul Bachi
University of Kentucky Research and Education Center

Spore-producing bodies called "pycnia" on the upper surface on infected spots.