Oak Anthracnose

(Apiognomonia errabunda)

Conservation Status
Oak Anthracnose
  IUCN Red List

not listed


not listed


not listed


Oak Anthracnose is a somewhat common but not especially harmful pest of oaks. It infects all oaks but is especially severe on white oak and bur oak. It appears in the spring and summer after a prolonged period of rainy, wet weather.

It first appears as irregular, water-soaked spots on young and wounded leaves of lower and inner branches. The spots soon turn black. When the spots dry out the infected part of the leaf is dead and turns tan or brown. Spots may coalesce into large brown areas. As leaf expansion continues around the dead or infected area, the leaf shape becomes deformed and often cupped.

An infection can cause complete defoliation but that is not fatal. Since the infection occurs early in the growing season, the tree will produce a second flush of leaves.

The fungus overwinters in leaf litter, on twigs and stems, and in cankers.


Similar Species

Habitat and Hosts





Spring and summer after wet weather


Distribution Map



4, 7, 24, 26, 29, 30, 77.

Forest Insect and Disease Newsletter - Wet Summer 2017. Minnesota Department of Natural Resources




Widespread and common

  Kingdom Fungi (fungi)  
  Subkingdom Dikarya  
  Division Ascomycota (sac fungi)  
  Subdivision Pezizomycotina  
  Class Sordariomycetes  
  Subclass Sordariomycetidae  
  Order Diaporthales  







Apiognomonia quercina

Apiognomonia tiliae

Discula umbrinella

Gloeosporidium tiliae

Gloeosporidium umbrinellum

Gloeosporium fagi

Gloeosporium fagi

Gloeosporium tiliae

Gloeosporium umbrinellum

Gnomonia errabunda

Gnomonia quercina

Gnomonia tiliae

Gnomonia veneta

Labrella fagi

Laestadia errabunda

Myxosporina fagi

Myxosporina tiliae

Sphaerella errabunda

Sphaeria errabunda


Common Names


Oak Anthracnose








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Oak Anthracnose on northern pin oak

    Oak Anthracnose   Oak Anthracnose  
    Oak Anthracnose   Oak Anthracnose  






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Other Videos
  Home Gardener - Oak Anthracnose
Hillside Garden Center

Uploaded on Jun 30, 2011

June 28th, 2011 - Every year different weather conditions allow for different diseases to flourish in plant populations. This year we have seen quite a few cases of Anthracnose in the Oak population. We take a look at where Anthracnose comes from and how to treat it.




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