05-03-2026 10:07
Hulda Caroline HolteHello, I found and collected this species growing
07-03-2026 13:06
éric ROMERO
Bonjour tous, Sur cône d'épicea fortement imbu,
08-03-2026 14:05
Thierry Blondelle
Bonjour à tous,Sur 3 récoltes supposées de H. l
05-03-2026 16:30
François BartholomeeusenDear forum members, On the 2nd of February 2026,
06-03-2026 09:41
Alain GARDIENNET
Hi forum, I'm now looking for another reference c
Exosporium tiliae
Thierry Blondelle,
16-02-2026 18:34
Bonjour,La micro de cet anamorphe de Hercospora sur Tilia me pose un problème. Je n'arrive pas à distinguer les conidies des conidiophores car il me semble qu'ils ont sensiblement les mêmes longueurs.
Y a t-il des critères pour les différencier ?
Merci à vous
Thierry B
Mathias Hass,
16-02-2026 20:48
Re : Exosporium tiliae
In my experinece you can clearly see the long brown multiseptate conidiophores of Exosporium tiliae, compared to Helminthosporium oligosporum with short conidiophores and a very compact structure. So I think this is Helminthosporium oligosporum. The conidia are very variable in shape and size. I don't see anything that looks like a conidiophore on your pictures, except the short dark brown things on picture 2. I think all the rest are all conidia. However, there may be other possibilities on Tilia that I'm unware of.
Cheers Mathias
Thierry Blondelle,
17-02-2026 00:03
Re : Exosporium tiliae
Hello Mathias,
You're right. Conidiophores of H. oligosporum are really shorter.
Thanks.
Thierry
You're right. Conidiophores of H. oligosporum are really shorter.
Thanks.
Thierry