15-02-2026 04:32
Tomaz Vucko
One more specimen that is giving me some descent a
17-02-2026 17:26
Nicolas Suberbielle
Bonjour à tous, Je recherche cette publication :
08-12-2025 17:37
Lothar Krieglsteiner
20.6.25, on branch of Abies infected and thickened
17-02-2026 13:41
Isabelle CharissouBonjour, est-ce que quelqu'un pourrait me fournir
16-02-2026 18:34
Thierry Blondelle
Bonjour,La micro de cet anamorphe de Hercospora su
16-02-2026 21:25
Andreas Millinger
Good evening,failed to find an idea for this fungu
16-02-2026 17:14
Joanne TaylorLast week we published the following paper where w
16-02-2026 16:53
Isabelle CharissouBonjour, quelqu'un pourrait-il me transmettre un
Nectria? on leaves
Marja Pennanen,
02-09-2014 10:10
these Nectria like fungi grow on leaves and their stems. The photo is from Sorbus aucuparia, buy they grow on propably Salix (or Malus), too.
They are about 0,2 mm wide.
The spores are two celled, about 16-19x4-5 and asci are about 70-90x10-12.
I really need a better key for Nectria like fungi, because it has been impossible to determine these lately. Does someone know, where to look for one?
Marja
Jacques Fournier,
02-09-2014 11:00
Re : Nectria? on leaves
Dear Marja,
the only advice I can give you and others is to start with the masterful paper about genera: Rossman et al 1999, Genera of Bionectriaceae, Hypocreaceae and Nectriaceae (Hypocreales, Ascomycetes), 1999, Studies in Mycology 42. 1-248. Maybe someone on the forum has it as a pdf, unfortunately I don't.
There you will learn about the importance of the reaction of the ascomatal wall in KOH and lactic acid, the structure of the wall, the presence of hairs, stroma, the anamorphs and features of cultures before suggesting a genus, let alone a species.
If you skip that step it will be difficult to make any progres with these fascinating fungi.
I wish you good luck!
Jacques
the only advice I can give you and others is to start with the masterful paper about genera: Rossman et al 1999, Genera of Bionectriaceae, Hypocreaceae and Nectriaceae (Hypocreales, Ascomycetes), 1999, Studies in Mycology 42. 1-248. Maybe someone on the forum has it as a pdf, unfortunately I don't.
There you will learn about the importance of the reaction of the ascomatal wall in KOH and lactic acid, the structure of the wall, the presence of hairs, stroma, the anamorphs and features of cultures before suggesting a genus, let alone a species.
If you skip that step it will be difficult to make any progres with these fascinating fungi.
I wish you good luck!
Jacques
Christian Lechat,
02-09-2014 17:32
Re : Nectria? on leaves
Hi Marja,
Here are some pages from Rossman 1999.
Cheers,
Christian
Here are some pages from Rossman 1999.
Cheers,
Christian
Rossman-1999-0001.pdf
Alain GARDIENNET,
03-09-2014 22:04
Re : Nectria? on leaves
Hi friends,
It's always online, on SIM website : http://www.cbs.knaw.nl/publications/Sim42/content/contents.htm
Here, could it be an Hydropisphaera Christian ?
Alain
Marja Pennanen,
04-09-2014 08:58
Re : Nectria? on leaves
Hi Jacques, Christian, Alain,
thank you for these information. I try to study them, when time allows.
So can this be a Hydropisphaera, I do not know yet ;)
Marja
thank you for these information. I try to study them, when time allows.
So can this be a Hydropisphaera, I do not know yet ;)
Marja
Christian Lechat,
04-09-2014 17:42
Re : Nectria? on leaves
Hydropisphaera is not impossible, il would be necessary to see a vertical section through ascomatal wall and an image of dried ascomata.
Marja,
if you want you can send me your collection.
All my best
Christian
Marja,
if you want you can send me your collection.
All my best
Christian
Marja Pennanen,
04-09-2014 23:43
Re : Nectria? on leaves
Dear Christian,
you know pretty well, that my surgery skills with my poor equipment are not the best possible ;)
So you will get post from me.
Marja
you know pretty well, that my surgery skills with my poor equipment are not the best possible ;)
So you will get post from me.
Marja