Oadi Matny and Mukwa Fama Tongo Lyna Pathogenic structure of the picture looks like Aspergillus also. But it could be Botrytis cinerea. Mohammed Djelilate Mohammed please provide us with some good pictures and the source of sample collection. Then identification of this pathogen will be accurate.
I think your isolate is Aspergillus sp. Howerver, to identify at species level you need to do DNA sequence. Morphological identification maybe accurate just at genus scale.
Oops, I was commenting on Franci's image, not on the one shown on top.
That one though, does not have the usually spherical conidial head found with Aspergillus spp. Based on the overall appearance of that image, the pathogen could even be a Rhizopus sp.
Not mention from which part of Green gram, pathogen isolated. Even picture shown is not clear. We can't imagine as Aspergillus unless whole history of pathogen known. In case of Botrytis grapes like sporangia seen.