13-02-2026 18:05
Margot en Geert VullingsOn February 9, 2026, we found these small hairy di
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Margot en Geert VullingsOn a barkless poplar branch, we found hairy discs
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Tomaz Vucko
Hello! I found these immersed perithecia on a stic
15-02-2026 04:32
Tomaz Vucko
One more specimen that is giving me some descent a
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Tomaz Vucko
Hy!I would ask for some help determing this specie
09-02-2026 14:46
Anna KlosGoedemiddag, Op donderdag 5 februari vonden we ti
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Valencia Lopez Francisco JavierHola colegasEstoi interesado en este articulo, Agn
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Bernard CLESSE
Bonjour à toutes et tous,Pourriez-vous m'aider à
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patrice CallardBonjour, la face inférieure des feuilles ce certa
Strange tar spots on Betula
Steffen Lorenz,
27-07-2015 22:57
does anyone have an idea what species these black spots could be?
It is only a mass of conidia. When fresh, it was a convex structure, some flowed together. The texture was watery and stained the fingers. When dry it is a thin, powdery coating.
Conidia: 11,5-18 x 8,5-10 µm, elliptical greyish-brownish, nonseptate, thick-walled, multiguttulate, with conspicuous porus
Porus: 1,5-2 x 0,5-1 µm
Substrate: dead branches of Betula pendula lying on the ground
Best regards
Steffen
Gernot Friebes,
27-07-2015 23:08
Re : Strange tar spots on Betula
Hi Steffen,
I'd suggest Melanconis stilbostoma.
Best wishes,
Gernot
I'd suggest Melanconis stilbostoma.
Best wishes,
Gernot
Steffen Lorenz,
28-07-2015 00:00
Re : Strange tar spots on Betula
Hello Gernot,
comparing the description of Ellis & Ellis I am sure you are right. Thanks Gernot.
Regards
Steffen
comparing the description of Ellis & Ellis I am sure you are right. Thanks Gernot.
Regards
Steffen