Fire blight is a bacterial disease.
Fire blight is especially destructive to apple, pear, quince and crabapple. Fire blight bacteria can be spread by Insects, rain splash or contaminated pruning tools. Controls include resistant varieties, cultural practices, pruning and preventive sprays. Fire blight is a bacterial disease that affects certain species in the rose family. It is especially destructive to apple, pear, quince and crabapple.