Bonsoir Luc
Perhaps a Phaeoseptoria species? See the attached file.

amitiés
Chris

Cher Luc,

Désolé, mais je ne peut pas vous aider parce que ma question sur le forum du 1/7/2014 est restée sans réponse.
Je présume que mon trouvé, aussi en Belgique, est le même comme le vôtre.
Espérons que, pour nous deux, nous obtenons une détermination maintenant ?

Cordialement,

François Bartholomeeusen

http://www.ascofrance.fr/search_forum/30092

Hi Chris,
Thanks for this paper, which I didn't own. From the descriptions and the drawings, yes, definitely a Phaeoseptoria. The closest I see in this paper is Phaeoseptoria calamagrostidis, due to the size and form of conidia's and the number of septa's. On my sample, they're still a bit longer, up to 88 µ, and a bit thicker (but the thickness is maybe less problematic: my obsevations were done in water).

It's something very close, but I still wouldn't risk a conclusion. I don't know if further studies have been done in this genus.

Cheers - LUC.

François: pour ta récolte, je vois 5 septa. C'est autre chose, peut-être un autre Phaeoseptoria ou un Hendersonia, mais je ne le connais pas.