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Image Subject Name Scientific Name Description
5379811 powdery mildew Phyllactinia guttata
5366821 apple scab Venturia inaequalis Close-up view of apple scab (Venturia inaequalis) on a crabapple leaf.
5366790 Marssonina blight of poplar Marssonina populi Close-up view of Marssonina blight (Marssonina populi) on an aspen leaf.
5366791 Marssonina blight of poplar Marssonina populi Close-up view of Marssonina blight (Marssonina populi) on an aspen leaf.
5366714 Thyronectria canker Thyronectria austroamericana Close-up view of the signs and symptoms of Thyronectria canker (Thyronectria austro-americana) on the trunk of a honeylocust (Gleditsia triacanthos) tree.

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