Erinose mite

  • Leaf blisters caused by erinose mite
    Leaf blisters caused by erinose mite
  • Typical blistering in spotted gum leaves
    Typical blistering in spotted gum leaves

General information

Erinose mites are microscopic invertebrates that feed on plant tissue, causing distortion and abnormal growth in shoots and leaves. The pest can cause damage in young spotted gum plantations.

Scientific name

Rhombacus & Acalox species

Description

Because they are so small, field identification is based on the symptoms they cause. Aggregations of thousands of mites cause raised, yellow to red blisters on leaf surfaces. In severe cases, the blisters cover the whole leaf surface.

Hosts
  • Spotted gums: Corymbia citriodora subsp. citriodora, C. citriodora subsp.variegata, C. henryi, C. maculata.
  • Queensland oak: Corymbia citriodora subsp. variegata x C. torelliana
Where found

Northern New South Wales, south east Queensland, central Queensland

Damage
  • Blisters reduce the efficiency of photosynthesis and tree growth is affected when leaves are retained over long periods.
  • Severe defoliation occurs when heavily infested leaves are shed prematurely.
  • Mites can cause shoot distortion so that the tree loses apical dominance.
  • Damage is most prevalent in 2-3 year old plantations.
  • Different provenances of Corymbia vary with respect to tolerance. Woondum provenance is one of the most susceptible.

Further information

  • Infopest - current information about chemicals registered for use in forestry

Last updated 14 March 2017