Note the darken dead floral tissue and discoloration of the vascular system.
Branch dieback and wilt.
Fire blight hold over canker.
OSU Plant Clinic Image, 2017.
Pear (Pyrus spp.) - Fire Blight
Crabapple Cultivar Susceptibility
Note Arbor-OTC is registered for trunk injection, see label for details. Group 41 fungicide (antibiotic). 12-hr reentry.