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Extension > Fruit > Apple > Spots/blotches are depressed, dimpled, or cracked

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Apples > Fruit > Spots/blotches are depressed, dimpled, or cracked

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  • Image: Apple Scab 1
  • Image: Apple Scab 2
  • Image: Apple Scab 3

Apple Scab
Venturia inaequalis

  • Brown raised corky spots on fruit
  • Severely infected fruit may be deformed and cracked
  • Olive green to brown leaf spots with an irregular or feathered edge, eventually becoming a dark brown to black
  • Infected leaves turn yellow and drop prematurely
  • More information on Apple Scab...
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  • Image: Apple Curculio 1
  • Image: Apple Curculio 2

Apple Curculio
Anthonomus quadrigibbus

  • Adult weevils makes small punctures by feeding and laying eggs in the apple, resulting in a round tan spot and lumpy/misshapen fruit
  • Adult weevil is reddish brown, ¼ inch long, with four bumps on their backs
  • Weevils are present in early spring
  • More information on Apple Curculio...
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  • Image: Obliquebanded Leafroller 1
  • Image: Obliquebanded Leafroller 2
  • Image: Obliquebanded Leafroller 3

Obliquebanded Leafroller
Choristoneura rosaceana

  • Early season larvae feed inside bud clusters and developing fruit, resulting in fruit drop or corky scars on the fruit
  • Late season larvae can scar the fruit
  • Early season larvae feed on the undersurface of a leaf along the midrib or other large vein
  • Larvae are yellow-green and 1 inch in length when mature
  • Adult moth is reddish-brown with brown bands on the wings
  • More information on Obliquebanded Leafroller...
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  • Image: Redbanded Leafroller 1
  • Image: Redbanded Leafroller 2
  • Image: Redbanded Leafroller 3

Redbanded Leafroller
Argyrotaenia velutinana

  • Fruit injury is usually shallow with ragged edges and thick, corky tissue over the damaged area
  • Larvae skeletonize leaves from the underside, folding and webbing the leaves together
  • Larvae are green with a green head, and reach about ½ inch at maturity
  • Larvae are present early May – June
  • Adults have distinct red-brown bands on the forewings that form a V-shape when at rest, and are about ¼" in length
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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

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