Fire blight
Erwinia amylovora

• Infected leaves wilt, turn gray then dark brown to black
• Young shoots curl over into a shepherd's crook
• Infected blossoms first turn gray, then black
• Infected leaves and mummified fruit remain attached to the tree, often into winter
• Branch cankers have dark, sunken and cracked bark, sapwood is streaked reddish brown
• Drops of sticky honey-colored liquid can be seen on infected plant parts in warm wet weather
• More information on fire blight