Question

black rust of wheat is caused by

Answer 1

Puccinia graminis is the answer

Answer 2

tritici (now known as Puccinia triticina). Like the stem rust fungus, this pathogen is primarily a problem onwheat, but it may be weakly pathogenic on some cultivars of barley, triticale, and some species of goatgrass and wheatgrass. The thirdrust disease, stripe rust, is caused by Puccinia striiformis.