Hi,

I think it could be a pseudothecium, not a cleistothecium. The asci seem bitunicate to me, if I am not wrong

Best

Alfredo

Hi there, 

They remind me of Mycosphaerella but it difficult to tell without seeing ascomatal characters. 

Cheers, 

Ibai.

Hi Nadezda,

You have pictures of asexual structure, conidia, and conidiophore

Sincerely

Hi,

The ascospores and asci photos are good, but not enough without pictures of the ascocarps.

surely a Mycosphaerella sp., or these days, one of the Mycosphaerella-like genera within the Mycosphaerellaceae. To identify these reliably to genus level requires either the asexual stage or a DNA sequence.

I agree with Dr.Peter to identify the genus level need a DNA sequence

Nice photos, Nadezda, although it would be fine to see the photos of the deseased plant and the whole ascocarps too to define the species precisely. Are you sure, they are typical cleistothecia?

If there are blackish leaf spots, and pseudothecial ascomata, Mycosphaerella ribis this may be (based on the host species).

PS: The pseudothecia may look similar to cleistothecia ;)

Maria

Dear , Nadezda Ondejkova . There is no ascocarp in the picture . What is the features of the ascocarp please . It may be Mycosphaerella sp. but not surely.

Best regards

I agree with Dr. Yehya and Zheng Wang answers , you must put ascocarp picture.

good luck