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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous Trees > Mountain Ash > Leaves webbed on ends of branches

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Mountain Ash > Leaves > Leaves webbed on ends of branches

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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 droppings and pieces of leaves
  • Feeds on leaves within webbing; feeding can be severe when large numbers are present
  • Yellowish or greenish with long, fine white hairs with two rows of black spots down its back; approx. 1 inch long when fully grown
  • Damage occurs from late July through September
  • More information on Fall webworm

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