Tapesia acuformis is the causal agent for a variety of cereal and forage grass diseases. The anamorph of T. acuformis was formerly known as the R-type strain of Pseudocercosporella herpotrichoides. The W-type strain of P. herpotrichoides is now known as T. yallundae.
Agropyron elongatums genetic resistance to this disease is useful to introgress into wheat.