Diaporthe eres is a fungal plant pathogen, which is the type species of genus ''Diaporthe''. It causes canker disease in a wide variety of hosts.[1] This species has a long history, having been described many times under various synonyms, for instance, the fungus was illustrated by James Sowerby in 1803 under the name Sphaeria ciliaris, attributed to Bulliard. The name D. eres has been proposed for conservation in order to avoid bothersome name changes due to priority.[2]