16-02-2026 18:34
Thierry Blondelle
Bonjour,La micro de cet anamorphe de Hercospora su
08-12-2025 17:37
Lothar Krieglsteiner
20.6.25, on branch of Abies infected and thickened
16-02-2026 17:14
Joanne TaylorLast week we published the following paper where w
16-02-2026 17:13
Joanne TaylorLast week we published the following paper where w
16-02-2026 16:53
Isabelle CharissouBonjour, quelqu'un pourrait-il me transmettre un
16-02-2026 11:53
Joeri Belisbetween leaf litter on twig in young salix growth.
14-02-2026 22:45
Tomaz Vucko
Hy!I would ask for some help determing this specie
13-02-2026 03:30
Tomaz Vucko
Hello! I found these immersed perithecia on a stic
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