European wasp: declared pest

Page last updated: Monday, 23 March 2020 - 11:19am

The European wasp is considered one of the worst wasps in the world - harmful to people, our outdoor lifestyles and to our horticultural and agricultural industries. Suspect European wasp sightings must be reported to our department.

2019-2020 season

The 2019-2020 hunt for European wasps in WA has begun, with residents and businesses urged to be on the lookout for the pest. 

Summer-Autumn is the best time to locate nests as wasps leave to scavenge for food, making them easier to detect and trace back to their nest.

More than 3500 traps have been deployed across Perth and regional areas, as part of the coordinated surveillance efforts to detect the presence of European wasp.

Find out where we are locating European wasps and if your suburb is a hot spot. 

Key impacts of European wasps

The European wasp, Vespula germanica, is a social wasp native to Europe, North Africa and temperate Asia. European wasp invasion to other regions has been greatly aided through hitching rides on human transportation. The wasp has become established in North America, Canada, Chile, Argentina, South Africa, New Zealand and in south-east Australia (SA, NSW, ACT, VIC and TAS). While occurrences of European wasp in Australia have been documented since 1960, the Western Australian European Wasp Eradication Program had successfully eradicated each detected wasp incursion in WA.

  • Pose a safety risk to land users due to their foraging activities, high aggression and hidden nests – e.g. maintenance and field staff, bush walkers, picnickers, residents, café patrons, orchardists etc.
  • Underground nests are difficult to see and disturbing a nest can lead to 1000s of wasps attacking in defense.
  • Risk to the environment – wasps compete with and predate on native insects; reducing insect numbers, biodiversity and ecosystem function.
  • Wasps forage for human food and drink as well as pet food – causing a nuisance and a health concern to people and pets.
  • Damage horticultural crops like grapes and stone fruits and predate on bees in managed apiaries – impacting home gardeners and industry alike.

Due to favourable environmental conditions and the lack of natural predators, the European wasp has the potential to become a greater pest in Western Australia than anywhere else in the world.

Each year fertilised wasp queens arrive in Western Australia via freight and cargo from the eastern states. The queens spread to find suitable places to seed new nests that will become large (mainly underground) nests. These nests would house many thousands of wasps.

Without ongoing surveillance trapping and public reporting, European wasps would become established in WA. The predicted range of establishment for European wasp in WA is from Kalbarri to Eucla.

The importance of taking action

Outside its natural habitat of Europe and North Africa, this wasp becomes a serious social, environmental and agricultural pest.

High wasp population densities would threaten WA’s outdoor lifestyle, tourism, human health and the well-being of our pets and livestock. Horticulture, viticulture and apiculture industries would suffer if this pest became established in WA.

Since 1994, the Agriculture and Food Division of the Department of Primary Industries and Regional Development (DPIRD) has been working with the community to conduct a surveillance and eradication program. Increased community awareness and reporting is keeping this program a success. Learn more about the Adopt-a-Trap Program.

For more information contact:

Pest and Disease Information Service (PaDIS)
Telephone:+61 (0)8 9368 3080