Pest insects

Pest insects can have adverse and damaging impacts on agricultural production and market access, the natural environment, and our lifestyle. Pest insects may cause problems by damaging crops and food production, parasitising livestock, or being a nuisance and health hazard to humans.

Western Australia is free from some of the world's major pest insects. Biosecurity measures on your property are vital in preventing the spread of insects.

The Department of Primary Industries and Regional Development provides:

  • biosecurity/quarantine measures at the WA border to prevent the entry of pest insects
  • where relevant post border biosecurity measures
  • advice on widespread pest insects present in the state.

For advice on pest insects search our website, the Western Australian Organism List or contact our Pest and Disease Information Service (PaDIS).

For diagnostic services, please contact our Diagnostic Laboratory Services.

Articles

  • Citrus gall wasp is a pest of citrus trees grown in backyards and orchards. Citrus tree owners are encouraged to implement control measures on their property to reduce the threat to the citrus indu

  • Western Australia has a low prevalence of citrus pests and diseases compared to most other countries.

  • Find out more about the most common insect pests of citrus trees occurring in home gardens in Western Australia and their control using natural or low toxic chemical controls.

  • Four species of aphids on citrus are recorded in Australia but only two occur in Western Australia, the brown/black citrus aphid Toxoptera citricidus (Kirkaldy) and spiraea aphid, Aphi

  • Citrus leafminer, Phyllocnistis citrella Stainton, is the only leafminer attacking citrus in Australia.

  • Carpophilus, also known as driedfruit beetles, are a worldwide pest of fruits, both pre- and post-harvest, and grains.

  • Thrips (Thysanoptera) are small, slender, soft-bodied insects, just visible to the naked eye.

  • Mealybugs (family Pseudococcidae) are oval-shaped, segmented, soft-bodied insects covered with white, mealy wax. They are often found between touching fruit, under the calyx or in the 'navels' of o

  • The crusader bug (Mictis profana) is an insect commonly found in citrus, with a wide distribution within Australia, Indonesia and the Indo-Pacific.