Pear (Pyrus spp.)-Nectria Canker (European Canker)

See:

Apple (Malus spp.) - Nectria Canker (European Canker)

Note Neonectria ditissima (formerly Nectria galligena), a fungus. Pear is susceptible but only when conditions are very favorable for disease development such as west of the Cascade Range.