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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Fruit > Grape > Holes in leaves

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Grape > Leaves > Holes in leaves

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  • Image: Japanese Beetle 2
  • Image: Japanese Beetle 1

Japanese Beetle

  • Skeletonize leaves, i.e. chews tissue between veins, leaving foliage lace-like
  • Adults are a brilliant metallic green with copper-brown wing covers, five white patches of hairs on each side of the abdomen, and two patches of white hair on the tip of abdomen
  • Adults present June through July
  • More information on Japanese Beetle...
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  • Image: Grape Flea Beetle 3
  • Image: Grape Flea Beetle 2
  • Image: Grape Flea Beetle 1

Grape Flea Beetle

  • Larvae feed on leaves, avoiding leaf veins
  • Feeding damage is greatest at leaf borders
  • Larvae are small (1/4" when mature), light brown with dark mottling and a black head
  • More information on Grape Flea Beetle...
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  • Image: Rose Chafer

Rose Chafer

  • Can skeletonize leaves, i.e. chews tissue between veins, leaving foliage lace-like
  • Feed on blossoms, chewing holes in them
  • Occurs in late May and June
  • Up to nearly 1/2 inch in length; slender tannish beetle with reddish-brown spiny legs
  • More information on Rose Chafer...
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  • Image: Eightspotted Forester 1
  • Image: Eightspotted Forester 2

Eightspotted Forester

  • Larvae eat entire grape leaf with the exception of heavy veins and petiole
  • Larvae are present in June and July
  • Larvae are colorful; white with bright orange stripes, black lines and black spots. It also has an orange head with black spots, and is 1 ½ inches long at maturity
  • More information on Eightspotted Forester...
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  • Image: Hornworm 1
  • Image: Hornworm 2

Hornworms

  • Larvae eat entire leaf, including leaf veins
  • Hornworm larvae are the largest caterpillars in Minnesota. Larvae develop eight white, lateral "v-shaped" marks. Most hornworms have a black projection or "horn" on the last abdominal segment
  • Larvae are present in July and August
  • More information on Hornworms...

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