| Bacteria, Dickeya dadantii, Xanthomonas, Pseudomonas syringae, Pectobacterium|
Erwinia is a genus of Enterobacteriaceae bacteria containing mostly plant pathogenic species which was named for the famous plant pathologist, Erwin Frink Smith. It contains Gram-negative bacteria related to Escherichia coli, Shigella, Salmonella, and Yersinia. They are primarily rod-shaped bacteria.
Many infect woody plants. A well-known member of this genus is the species E. amylovora, which causes fire blight on apples, pears, and other Rosaceae crops; E. tracheiphila, though, causes bacterial wilt of cucurbits. Other familiar species, such as E. carotovora (another major cause of plant diseases), are more distantly related to the fire blight bacterium, and been moved to genera Brenneria, Dickeya, and Pectobacterium.
Species remaining in Erwinia are:Erwinia amylovora
Candidatus Erwinia dacicola