The Powdery Mildews

  • Ervin H. Barnes


Throughout the temperate zones of the world, on many different kinds of plants, there occurs a whitish fungus growth of the powdery mildew fungi (Figs. 26-1,-3,-6). These fungi, which comprise the family Erysiphaceae, are all obligate parasites and all but a few are ectoparasites. Ectoparasites grow on the surface of the host and invade only with haustoria (Fig. 26-2). Even these structures are limited usually to the epidermal cells. Some members of the Erysiphaceae also occur in tropical areas.


Epidermal Cell Powdery Mildew Dormant Season Powdery Mildew Fungus Obligate Parasite 
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Suggested Reading

  1. Schnathorst, W. C., “Spread and Life Cycle of the Lettuce Powdery Mildew Fungus.” Phytopathology, Vol. 49 (August, 1959), pp. 464–468; 562-571.Google Scholar

Copyright information

© Plenum Press, New York 1979

Authors and Affiliations

  • Ervin H. Barnes
    • 1
  1. 1.Michigan State UniversityUSA

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