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23-04-2026 06:46

François Freléchoux François Freléchoux

Bonjour, Voici la description d'un minuscule asco

21-04-2026 22:14

Margot en Geert Vullings

This cup fungus was found on April 10, 2026, on lo

22-04-2026 20:17

Marian Jagers Marian Jagers

Is anyone familiar with the Hyphomycetes genus Pse

22-04-2026 20:54

Enrique Rubio Enrique Rubio

Hi to everybody.This Pyrenopeziza grew in moist le

22-04-2026 19:12

Louis DENY

Bonjour forum.Trouvé à Belfort, est de la France

21-04-2026 21:00

Sylvie Le Goff

Bonjour à tousJe sollicite votre aide pour cet as

22-04-2026 01:06

Richard VALERI Richard VALERI

Bonjour à tous.Je vous présente cette Nectria s.

21-04-2026 13:36

Gernot Friebes

Hi,I am out of ideas for this one. I collected Sal

21-04-2026 13:19

Gernot Friebes

Hi,this Lophodermium on Typha has ascospores measu

21-04-2026 13:05

Gernot Friebes

Hi,this hyphomycete feels familiar but I was not a

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Gibberella sp? on Acer.
Mirek Gryc, 22-03-2021 14:23

Hi.
Many times I found species from this kind but have usually missed conidiophores. This time, however, both forms occur at the same time almost in every sample collected so I think conidiophores belongs to this species.
I looked through all the available articles on Gibberella but nothing could match. Finally, I found a drawing of Gibberella intricans, Wollenweber, H.W. Fusaria Autographic Delineata, EDN 3: I, 660-1100: 810 (1930).
In principle, all features match my collection.
Initially measured the spores overripe, I did not fit their width. I found a less mature fruiter whose spores with sizes correspond to those from the engravings.
Relevant note is that the spores are in most 3-septata (rarely 5-septata).

Spores;
(27.7) 27.8 - 31.2 (31.5) × (5.3) 5.9 - 7.3 (7.5) µm
Q = (3.9) 3.94 - 5.27 (5.3) ;
Me = 29.1 × 6.6 µm ; Qe = 4.4
Conidia
31.3 - 37.2 × 4.6 - 4.89 (4.9) µm
Q = (6.8) 6.84 - 7.6 ;
Me = 33.7 × 4.7 µm ; Qe = 7.2


However, I am wondering a very poor reaction to KOH?
What is your opinion on it?
greetings
Mirek

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Bernard Declercq, 22-03-2021 17:49
Bernard Declercq
Re : Gibberella sp? on Acer.
Hi Mirec,

This is clearly a Fusarium ss. str.(syn.: Gibberella).
Compare with lignicolous species Fusarium lateritium Nees, ascospores as well as 3(5)-septate conidia seem to match.

Bernard
Mirek Gryc, 22-03-2021 19:43
Re : Gibberella sp? on Acer.
Hi Bernard.
Again, I had to look a bit of literature about it and compare my.
It seems to me that you are right. Features very good fit to the genre that you offered.
Thank you very much
Mirek