Fire blight is a common and frequently destructive bacterial disease of pome fruit trees and other related plants. Pear and quince trees are extremely susceptible. Fire blight infections can destroy limbs and even entire shrubs or trees. Fire blight most commonly attacks blossoms, but it can also infect succulent tissues of shoots and water sprouts (root suckers). Infections may extend into scaffold limbs, trunks, or root systems, and may kill highly susceptible hosts. Less susceptible varieties may be severely disfigured.

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