Black Leaf Spot of Elm

  • Ervin H. Barnes


The most prevalent leaf-spotting disease of the elms is that caused by Gnomonia ulmea. Although it appears early in the spring, it is most noticeable in the autumn when the fallen brown leaves on the ground exhibit a plethora of little black spots (Fig. 29-1). Usually no harm is done but, on occasion, severe attacks in early spring bring about considerable defoliation.


Plant Pathology Early Spring Leaf Spot Black Spot Severe Attack 
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Copyright information

© Plenum Press, New York 1979

Authors and Affiliations

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

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