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23-05-2010 21:30

Hans-Otto Baral Hans-Otto Baral

In Arcon, le Gué de la Chaux, on attached Pinus s

23-05-2010 21:20

Martin Bemmann Martin Bemmann

Dear all, I am currently in the northern mounta

23-05-2010 18:37

Javier Ormad

Connues sont les difficultés à déterminer les m

20-05-2010 21:44

Gilbert MOYNE

Voici un petit Ciboria (je pense) récolté ce jou

20-05-2010 08:42

Marja Pennanen

Hello, these are about 0,3-0,7 mm wide and seems

20-05-2010 08:37

Jacques Fournier Jacques Fournier

Bonjour à tous, quelqu'un pourrait il me procure

18-05-2010 18:35

Roland Labbé

Bonjour ! Voici une planche de ce que nous croy

17-05-2010 20:22

Jean Pierre Dechaume Jean Pierre Dechaume

Dans une plantation de tuyas... à 800m d'altitude

17-05-2010 18:56

Guy Exbrayat

Sur Pin sylvestre et Thuya. Suite à une premièr

17-05-2010 13:35

Marja Pennanen

Hello, I've preserved some specimen in blastic bo

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Fusarium
Hans-Otto Baral, 23-05-2010 21:30
Hans-Otto BaralIn Arcon, le Gué de la Chaux, on attached Pinus sylv. twig in ca. 1 m above ground, grew this Fusarium. Sporodochia 0.6-1 mm diam.

Is it possible to recognize a teleomorph genus, or a species?

Zotto
  • message #11579
Hans-Otto Baral, 23-05-2010 21:32
Hans-Otto Baral
Re:Fusarium
Conida ca. *28-34 x 3.8-4.4 µm
  • message #11580
Christian Lechat, 24-05-2010 06:56
Christian Lechat
Re:Fusarium
Hi Zotto,
your Fusarium resembles to Fusarium circinatum = Gibberella circinata known on Pinus.
Unfortunately, it is impossible to determine this fungus without cultivating it, we have to know if it produces microconidia.
Regards,
Christian
Hans-Otto Baral, 30-06-2010 10:56
Hans-Otto Baral
Re:Fusarium
Hi Christian

you know I made a culture of thsi fungus, which grew quite rapidly. After adding acetic acid to it (you recommended tartaric acid) I obtained abundant conidia. There are mainly the large ones but some are small and only 1-septate. Dies that help?

Zotto
  • message #12152
Christian Lechat, 30-06-2010 15:47
Christian Lechat
Re:Fusarium
Hi Zotto,
on your photo I see conidia 0-4-septate and I would like to know if there are some conidia 5-septate in your culture. Could you please to send us an image of conidiogenesis from aerial mycelium and another from sporodochia.
Cheers,
Christian
Hans-Otto Baral, 30-06-2010 16:16
Hans-Otto Baral
Re:Fusarium
The conidia are mainly 3-4-septate, but I saw a few with 5 septa, see here.

The conidiophores in culture are difficult to photograph, the images are quite bad.
  • message #12163
Hans-Otto Baral, 30-06-2010 16:19
Hans-Otto Baral
Re:Fusarium
Here is a section of the sporodochia
  • message #12164
Hans-Otto Baral, 30-06-2010 16:19
Hans-Otto Baral
Re:Fusarium
Detail (see also near the beginning
  • message #12165
Christian Lechat, 30-06-2010 17:53
Christian Lechat
Re:Fusarium
size of conidia fits rather well with F. circinatum according to the scale bar on your third photo but it is very difficult to say which species of Fusarium it is without a complete description.
Maybe Gary will have an opinion?
Christian