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Home » Guide » Arthropods (Arthropoda) » Unidentified Tracks, Sign, and Other Mysteries » Unidentified Galls » Gall-like Structures Not Covered By BugGuide
Photo#542296
Dibotryon morbosum or syn. Apiosporina morbosa (Black Knot) on Prunus virginiana (Chokecherry)
Copyright © 2011 John R. Maxwell

Dibotryon morbosum or syn. Apiosporina morbosa (Black Knot) on Prunus virginiana (Chokecherry)
Edwin B. Forsythe National Wildlife Refuge (Brigantine), Atlantic County, New Jersey, USA
May 7, 2011
They may be from a previous year because there are many exit (or parasite entry) holes, and some are covered in lichen.

Images of this individual: tag all
Dibotryon morbosum or syn. Apiosporina morbosa (Black Knot) on Prunus virginiana (Chokecherry) Dibotryon morbosum or syn. Apiosporina morbosa (Black Knot) on Prunus virginiana (Chokecherry)
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Contributed by John R. Maxwell on 8 July, 2011 - 5:54pm
Last updated 24 July, 2011 - 9:24am

Moved
Moved from Unidentified Galls.
Apparently we didn't have one of these yet.
… Charley Eiseman, 24 July, 2011 - 8:47am login or register to post comments

Host plant...
...appears to be Chokecherry (Prunus virginiana), which suggests to me that these are fungal galls known as Black Knot, afflicting many species of Prunus.
… John Pearson, 23 July, 2011 - 8:51pm login or register to post comments

 
Agreed
I often see those holes in black knot fungi, and I haven't figured out yet what bug is responsible, but my first guess is they are exit holes of some kind of beetle. So far all I've found by breaking the galls open is:
… Charley Eiseman, 24 July, 2011 - 8:44am login or register to post comments

 
Thanks!
Oh well, at least I know to not try and "raise" one to find the gall maker!
… John R. Maxwell, 24 July, 2011 - 9:18am login or register to post comments

Moved
Moved from ID Request.
… John R. Maxwell, 8 July, 2011 - 10:12pm login or register to post comments

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