Eucalyptus deglupta

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  • zigzag-like tunnels visible on bark
  • semi-circular holes in the bark of the tree
  • epicormic shoots developing from the trunk
  • unhealthy young trees and trees planted in
  • unsuitable conditions are preferably infested and eventually die

Under-Bark Borer Agrilus opulentus (Buprestidae)

  • leaves are more or less densely covered with purple or brown blotches and translucent, shell-like lerps
  • infested tree can be completely defoliated and eventually dies

Lace or Basket Lerp Cardiaspina spp. (Psyllidae)

  • leaves are covered with white fibrous lerps that more or less defoliate the host
  • leaves often stained with black sooty mould growing on honey dew

Glycaspis spp. (Psyllidae)

  • wilt of whole branches starting from the tips and/or affecting the tree top
  • mud covers on the base of the tree up to a few metres
  • riddled wood filled with holes
  • termite nest with more or less regular, smooth surface often in adjacent tree
  • trees susceptible to damage by wind
  • trees of any age can be attacked and eventually die

Nasutitermes novarumhebridarium (Holmgren) (Termitidae)

  • young seedlings in the nursery completely defoliated, bent or cut off right above the soil
  • damage occurs mostly during night
  • stem of seedling debarked or ringbarked at the base

Seedlings either damaged by cutworms (Noctuidae) or by grasshoppers (Orthoptera)

  • leaves of terminal branches of younger trees trimmed by larval beetles
  • defoliation of tree tops
  • crescent-shaped feeding notches on leaves of the lower crown made by adult beetles

Eucalypt Leaf Beetle Paropsis spp. (Chrysomelidae)

(reprod. by permission of CSIRO Australia)

  • fine, powder-like dust on the bark beneath the bore holes
  • cross section shows boreholes that are radially arranged
  • infestation occurs mainly after fire

Xylothrips religiosus Boisduval and other powder-post beetles (Bostrichidae and Anobiidae)

(reproduced from Wylie, F.R. et al., 1973)

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Michael F. Schneider, 1999