Observation 96490: Wilsonomyces carpophilum

When: 2012-06-05

Collection location: Southeast Portland, Multnomah Co., Oregon, USA [Click for map]

Who: Daniel B. Wheeler (Tuberale)

No specimen available

I believe this is growing on English laurel (Prunus laurocerasus). Growing on one of my neighbor’s laurel bushes. I don’t much care for laurel except when it is flowering: the aroma of the flowers is similar to honey. I find the shrub invasive and a pain, second only to English ivy.


Damage to underside of laurel leaf: circular ruby red, with some blue or black around the edges.
Surface damage of laurel leaf: extensive redding around infection site, as well as depressed leaf surface where infected.
Close-up of underside of laurel leaf. Note the depressed areas where the fungus is growing (rube red, circular).
Additional underside of laurel leaf. Note raised central infection sites.
Surface of laurel leaf, showing extensive pink areas near original circular infection sites.

Proposed Names

57% (1)
Eye3 Eyes3
Used references: On-line references to “Shot-hole blight” on Prunus laurocerasus. While most references (OSU) had this on cherry (Prunus), apparently English laurel (Prunus laurocerasus) is close enough to be a host as well.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Appears to be Wilsonomyces carpophilum
By: Daniel B. Wheeler (Tuberale)
2012-06-05 22:31:28 PDT (-0700)

also known as “Shotgun blight” and “Shot hole blight”. Several other scientific names are suggested, but seem to be the same fungus. Don’t know which the current preferred name is. This is simply one of several mentioned in the literature.

Created: 2012-06-05 18:49:36 PDT (-0700)
Last modified: 2012-06-05 22:29:32 PDT (-0700)
Viewed: 53 times, last viewed: 2017-07-24 05:39:50 PDT (-0700)
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