© Queensland Government
© NSW DPI
Erinose mites are microscopic invertebrates that feed on plant tissue, and cause distortion and abnormal growth in shoots and leaves. They cause damage in young spotted gum plantations.
- Mites are too small to be seen by the naked eye or with a hand lens. They are identified by raised, yellow to red blisters on leaf surfaces, covering the whole leaf in severe cases.
- See high-resolution images of erinose mites.
- South-eastern Queensland
- Central Queensland
- Northern New South Wales
- Spotted gums (Corymbia citriodora subsp. citriodora, C. citriodora subsp. variegata, C. maculata)
- Less common on C. henryi and Corymbia hybrids
- Queensland oak (Corymbia citriodora subsp. variegata x C. torelliana)
- Prevalent in 2–3 year old plantations.
- Different provenances (origins) of Corymbia vary with respect to tolerance. Woondum provenance is one of the most susceptible and northern New South Wales provenances appear to be less susceptible.
- Large swarms of mites cause raised yellow to red raised blisters on the leaf surface. In severe cases blisters cover the entire leaf surface.
- Blisters reduce efficient photosynthesis and affect tree growth when leaves are retained over long periods.
- Severe defoliation can occur when heavily infested leaves are shed prematurely.
- Shoot distortion can cause the tree to lack a clear central stem (apical dominance).
Resources and research
- 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.
- Last reviewed: 29 Sep 2023
- Last updated: 29 Sep 2023