woolly apple aphid lifecycle

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UC Davis Afghanistan Agriculture Pest Management Woolly Apple Aphid Lifecycle


  • 1. Woolly Apple Aphid Lifecycle Nymph Winged Adult
  • 2. Woolly apple aphids overwinter as adults on roots and aerial parts of apple trees
  • 3. By early summer, large numbers of nymphs are produced. First-instar nymphs migrate up and down the tree.
  • 4. Wingless adults have reddish to purple bodies and are completely covered with woolly white wax.
  • 5. Root colonies cause swollen, nodular masses of gall tissue to form, stunting the tree.
  • 6. Aerial colonies of woolly apple aphids can cause burrs on tree limbs
  • 7. Pest ID: Aerial colony of wingless adult female woolly apple aphids
  • 8. Pest ID: Winged adult female woolly apple aphid (waxless)