Septotinia punctiformis ?

[BubikolRamios1]

Does that exists ?

Only source AFAIK: https://www.zdravgozd.si/dat/gradivo/6.pdf

Says: host: populus, brown spots 1-3 cm with concentric black circles

[abeja]

Hi,
I had a look at Mycobank.
Listed are:
Septotinia podophyllina (Ellis & Everh.) Whetzel ex J.W. Groves & M.E. Elliott,
Septotinia populiperda Waterman & E.K. Cash ex B. Sutton

In a google-book (Wood and Tree Fungi: Biology, Damage, Protection, and Use) I found (for populus)
next to Septonia populiperda ...
Drepanopeziza punctiformis (Drepanopeziza punctiformis Gremmen)

[BubikolRamios1]

http://agrozoo.net/jsp/Thesaurus.jsp?p3 ... nctiformis
no(looking at OP description): https://wiki.bugwood.org/Archive:Poplar ... _Leaf_Spot
via german term from agrozoo link: Blattfleckenkrankheit which looks to general to me:
https://www.pflanzenfreunde.com/blattfl ... nkheit.htm
yes, matches description from first link. 2 matching images !
Maybe you can find where if anywhere latin name is hidden on that page ? Can't find a thing.

[abeja]

Hi,
"Blattfleckenkrankheit" is a very general term, it does not mean a fungus in special.
A lot of different species can cause "Blattflecken" (leaf spots), and often those fungus species are strongly connected to a plant species.
And I do not have any experience in this field - if I see interesting "Blattflecken", I look for the plant species, google "Blattflecken" or "leaf spot" + plant species, if there are any matching pictures...
Sometimes - but rarely - there is only one "candidate". I don't call this "determination" - these things need in most cases microscopic determination.

[BubikolRamios1]

starting from slovenian names
Drepanopeziza punctiformis (namely = Septotinia punctiformis) - brown populus spot
http://agrozoo.net/jsp/Thesaurus.jsp?p3 ... dophyllina - populus ring spot
= could match description from OP: host: populus, brown spots 1-3 cm with concentric black circles