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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous Trees > Prunus > Webbing of leaves or on branches

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Prunus > Leaves > Webbing of leaves or on branches

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  • Image: Eastern tent caterpillar 1
  • Image: Eastern tent caterpillar 2
  • Image: Eastern tent caterpillar 3

Eastern tent caterpillar
Malacosoma americanum

  • Larvae form webs at branch forks, congregating in web only to feed on young leaves
  • In high populations, tree is covered in webbing and defoliated
  • White stripe running length of black body with bright blue spots; almost 2 inches long
  • Damage occurs in May and June
  • More information on Eastern tent caterpillar
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  • Image: Fall webworm 1
  • Image: Fall webworm 2
  • Image: Fall webworm 3

Fall webworm
Hyphantria cunea

  • Produces silken webbing that covers the ends of branches; silken tent filled with frass and leaf segments
  • Chews entire sections of leaves, leaving major veins and can defoliate trees in high infestations
  • Yellowish or greenish with long, fine white hairs with two rows of black spots down its back; approximately 1" when fully grown
  • Damage occurs from late July through September
  • More information on Fall webworm
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  • Image: Uglynest caterpillar 1
  • Image: Uglynest caterpillar 2
  • Image: Uglynest caterpillar 3

Uglynest caterpillar
Archips cerasivorana

  • Spin webs that become filled with frass and leaf pieces
  • Larvae eat leaves and can defoliate branches
  • Up to 1 inch long; black head and yellowish to dark green body
  • Cherry trees are preferred hosts
  • More information on Uglynest caterpillar

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