Puccinia x ?/ dead stem of Paeonia
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- Beiträge: 213
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Re: Puccinia x ?/ dead stem of Paeonia
Hi,
I don't think this is Puccinia (any stage), nor a rust fungus at all.
It resembles a pyrenomycetous fungus. Is there any elevated crest with a slit-like opening developping in the middle of the black spot? (Looking at the small picture ... could be ...)
In my “big book” I stumbled over the genus Lophiostoma.
Lophiostoma macrostomum ("an inmersed black bitunicate, pyrenomycetous fungus with a slit-like ostiole on a raised crest) is growing on herbaceous stems and wood of deciduous trees.
There are similar species with different spores (so micro-features would be necessary), growing in slightly different habitat (on grass/ on wood).
http://ascofrance.com/forum/14094/lophi ... acrostomum
I don't think this is Puccinia (any stage), nor a rust fungus at all.
It resembles a pyrenomycetous fungus. Is there any elevated crest with a slit-like opening developping in the middle of the black spot? (Looking at the small picture ... could be ...)
In my “big book” I stumbled over the genus Lophiostoma.
Lophiostoma macrostomum ("an inmersed black bitunicate, pyrenomycetous fungus with a slit-like ostiole on a raised crest) is growing on herbaceous stems and wood of deciduous trees.
There are similar species with different spores (so micro-features would be necessary), growing in slightly different habitat (on grass/ on wood).
http://ascofrance.com/forum/14094/lophi ... acrostomum
Viele Grüße von abeja
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- Beiträge: 213
- Registriert: Mi Jul 13, 2022 10:14 pm
Re: Puccinia x ?/ dead stem of Paeonia
I had a play with direction of light.... There is a longitudal slit almost on any black dot.
If you can see anyhing more... Cnecked other dry stems around. Limited to Paeonia.
http://agrozoo.net/jsp/Galery_one_image ... 435083de42
If you can see anyhing more... Cnecked other dry stems around. Limited to Paeonia.
http://agrozoo.net/jsp/Galery_one_image ... 435083de42
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Re: Puccinia x ?/ dead stem of Paeonia
Hi, I am far from sure about this. We see a slit, but hardly any elevation. Maybe you have the chance to observe a possible development?
On the other hand, I did not find anything in plant pathogens (in living plants) that looks similar. These are often irregular leaf spots.
https://bladmineerders.nl/?s=paeonia
On the other hand, I did not find anything in plant pathogens (in living plants) that looks similar. These are often irregular leaf spots.
https://bladmineerders.nl/?s=paeonia
Viele Grüße von abeja
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Re: Puccinia x ?/ dead stem of Paeonia
Good idea!
This is quite rare in Germany, I never heard about a Lophodermium spec. on paeonia before.
But in the BMG-Forum ...
https://forum.pilze-bayern.de/index.php?topic=1750.0
(Edit: Lophoderma in Lophodermium geändert)
This is quite rare in Germany, I never heard about a Lophodermium spec. on paeonia before.
But in the BMG-Forum ...
https://forum.pilze-bayern.de/index.php?topic=1750.0
(Edit: Lophoderma in Lophodermium geändert)
Viele Grüße von abeja
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Re: Puccinia x ?/ dead stem of Paeonia
I guess if you have not woody paeonia dead stems near by, you should find it, it is is all around. At least here.
Re: Puccinia x ?/ dead stem of Paeonia
In the Bavarian forum they were asking people to look for this fungus at garden plants. But here it is very common to remove the old parts. Mostly this fungus was found in one part of Bavaria (Franken), there are spots with paeonia offic. in nature (gone wild or deliberately planted there.)
Viele Grüße von abeja
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Re: Puccinia x ?/ dead stem of Paeonia
Just a note, encountered Hypoderma, looks similar:
http://www.dorsetnature.co.uk/pages-fungi/f-225.html
https://fungi.myspecies.info/all-fungi/hypoderma-rubi
http://www.dorsetnature.co.uk/pages-fungi/f-225.html
https://fungi.myspecies.info/all-fungi/hypoderma-rubi
Re: Puccinia x ?/ dead stem of Paeonia
They belong to the same family (Rhytismataceae) or at least to the same order (Rhytismatales).
Sometimes it is not yet clear, where to put a genus ... genetics.
Rhytismataceae
https://www.mycobank.org/page/Name%20de ... page/93068
I think the "best-known species" that nearly everyone has seen in passing is Rhytisma acerinum, those black spots on maple leaves.
Here I once managed to see the apothecia break open in spring (found an old leaf, put it into a box at home with some moist paper).
https://forum.dgfm-ev.de/thread/2018-rh ... an-spitza/
Sometimes it is not yet clear, where to put a genus ... genetics.
Rhytismataceae
https://www.mycobank.org/page/Name%20de ... page/93068
I think the "best-known species" that nearly everyone has seen in passing is Rhytisma acerinum, those black spots on maple leaves.
Here I once managed to see the apothecia break open in spring (found an old leaf, put it into a box at home with some moist paper).
https://forum.dgfm-ev.de/thread/2018-rh ... an-spitza/
Viele Grüße von abeja