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09-01-2026 17:41

Arnold Büschlen

Hallo, F. dilatata wird von vielen Bryoparasiten

10-01-2026 20:00

Tom Schrier

Hi all,We found picnidia on Protoparmeliopsis mur

07-01-2026 22:22

Danny Newman Danny Newman

Tatraea sp. on indet. hardwood The Swag, Great Sm

10-01-2026 01:18

Danny Newman Danny Newman

cf. Neovaginatispora fuckelii on indet. shrub Pre

07-01-2026 10:24

Danny Newman Danny Newman

Pezicula sp. on indet. hardwood Appalachian Highl

09-01-2026 10:08

Blasco Rafael Blasco Rafael

Hola, en el mismo habitat que la anteriorRetamaDia

08-01-2026 21:22

Blasco Rafael Blasco Rafael

Hola, He recogido esta muestra de Orbilia sobre Re

07-01-2026 17:29

Marc Detollenaere Marc Detollenaere

Dear Forum,On a barkless Populus I found some smal

10-11-2021 17:33

Riet van Oosten Riet van Oosten

Add-on topic http://www.ascofrance.com/forum/7059

07-01-2026 10:05

Danny Newman Danny Newman

cf. Chaetospermum on XylariaCosby Campground, Grea

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Macrodiplodiopsis desmazieresii on Platanus occidentalis
Ethan Crenson, 04-03-2019 06:04
In Brooklyn, New York.  I believe I have found Macrodiplodiopsis desmazieresii on a fallen branch of Platanus occidentalis in my neighborhood.  There are tiny pustules beneath the bark which contain large, thick-walled, brown conidia that are 3-septate and enveloped in a mucoid (?) sheathe.  Conidia are 44.5-52 x 17.3-19.8µm.  The branch was lying at the base of a large Platanus occidentalis--the only one in the area. The neighborhood is otherwise heavily populated by Platanus x acerifolia, so I suppose it is possible that the branch was from one of those trees.  Has M. desmazieresii been recorded on Platanus occidentalis?  Is my identification correct?

Thank you!
  • message #56580
  • message #56580
  • message #56580
Katarina Pastircakova, 04-03-2019 08:27
Re : Macrodiplodiopsis desmazieresii on Platanus occidentalis
Hi Ethan,

your identification is correct. Platanus occidentalis is also the host of M. desmazieri.
You can find some records here: 
https://nt.ars-grin.gov/fungaldatabases/new_allView.cfm?whichone=all&thisName=Macrodiplodiopsis%20desmazieresii&organismtype=Fungus&fromAllCount=yes

Katarina
Ethan Crenson, 05-03-2019 04:11
Re : Macrodiplodiopsis desmazieresii on Platanus occidentalis
Thank you very much.  I can't believe I did not know about the existence of that database!