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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Fruit > Apple > Rotted fruit

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Apples > Fruit > Rotted fruit

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  • Image: Black Rot 1
  • Image: Black Rot 2
  • Image: Black Rot 3

Black Rot
Botryosphaeria obtusa

  • Fruit is rotted but remains firm
  • Fruit may become mummified and remain on tree
  • Round leaf spots with a purple border & tan center
  • Large brown spots with brown rings form on fruit
  • Branch cankers can be sunken, reddish brown or rough looking or cracked bark; cankers may remain small or enlarge to become several feet long
  • Leaves on girdled branches wilt, die and turn brown
  • Common on stressed trees & trees infected with fire blight
  • More information on Black Rot...
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  • Image: White Rot 1
  • Image: White Rot 2
  • Image: White Rot 3

White Rot
Botryosphaeria dothidea

  • Sunken brown spots on fruit, can grow to rot part or all of fruit
  • Fruit rot is soft, watery and extends to the core of the apple
  • Small blister like spots on branches exude, watery fluid
  • Branch infections grow to cracked, flakey, orange canker
  • Leaves on girdled branches wilt, die and turn brown
  • For management information see Black Rot...
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  • Image: Fire Blight 1
  • Image: Fire Blight 2
  • Image: Fire Blight 3

Fire Blight
Erwinia amylovora

  • Infected fruit are shriveled and discolored
  • Young shoots bend over forming a "shepherd's crook"
  • Infected leaves wilt, turn gray then dark brown
  • Infected blossoms first turn gray, then black
  • Infected leaves & blossoms remain attached to the tree, often even in winter
  • Branch cankers have dark ,sunken & 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...

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