Raised, hard plate galls on western white gum leaves. Tiny, round wasp exit holes are visible.
Plate galler can cause severe damage in young western white gum plantations. The affected leaves appear brown.
The plate galler is a tiny wasp that completes its life cycle in the leaf lamina of young western white gum. The feeding larvae induce the tree to produce plate-like gall tissue on the upper leaf surfaces. It is the most important, known pest of western white gum and can cause severe defoliation in young plantations.
Raised, brown plate-like galls on the upper surface of leaves. The plate galls often form masses that can cover the leaf surface completely. Very small exit holes of adult wasps are sometimes seen on the gall surface.
Primarily found in Queensland.
Unique to western white gum (Eucalyptus argophloia).
Severe infestations can affect 100% of leaves, resulting in significant defoliation. Tree growth can be affected significantly for the first 1-3 years in plantations.
Carnegie AJ, Lawson SA, Smith TE, Pegg GS, Stone C, McDonald JM (2008) Healthy hardwoods: a field guide to pests, diseases and nutritional disorders in subtropical hardwoods. Forest Wood Products Australia, Victoria.
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