The Erysiphacere are popularly known as blights, white or powdery mildews. They are parasitic on quite a large variety of plants and during the summer are often quite conspicuous factors of the vegetation, covering the leaves or other parts with a white mycelium which sometimes gives the host an almost hoary appearance.
Proceedings of the Iowa Academy of Science
©1907 Iowa Academy of Science, Inc.
Anderson, J. P.
Proceedings of the Iowa Academy of Science, 14(1), 15-46.
Available at: https://scholarworks.uni.edu/pias/vol14/iss1/6