is it fungus sporulation ?

Hi all,

I have a trident mapple which is a little bit lazy this spring compared to my other and unfortunately, I think this is related to the black spots visible on the picture.


Would any one know what kind of fungus it could be and how to treat.
TIA

Hello Alain. At first glance this looks like a black version of the orange or red Coral spot fungus that usually manifests itself on deadwood but is known to spread to live wood. Out with the fungicide I reckon.

Thanks for your answer. Today was warm and when I went back to my tree to, at least, kill the sporulations with chlorine, growth was impressive compared to noon
I am going to apply mancozebe and myclobutanil, the only fungicides I got but an internet search doesn't show them as being much effective.