Biosecurity SA has declared an outbreak of Mediterranean fruit fly at Thevenard on the state's West Coast, following the detection of fruit fly larvae in the area on May 11.
A 1.5 kilometre outbreak area has been established around the detection point and quarantine restrictions apply.
Biosecurity SA executive director Will Zacharin said staff had commenced an eradication program aimed at eliminating any fruit flies from the outbreak area and nearby surrounds.
"Residents and businesses within the outbreak area will be receiving information from Biosecurity SA about the outbreak and associated quarantine, detailing what part they can play in preventing its spread," he said.
"An organic bait spotting program will be undertaken with staff also concentrating on the removal of fallen fruit from properties within the affected 200 metre outbreak zone area.
"Mediterranean fruit fly does not exist in SA and can only be brought into our state from infested fruit originating from WA.
"This has no impact on our fruit fly free status for the rest of the state and we are liaising with the horticultural industry on the outbreak and our eradication campaign."
Residents and businesses inside the quarantine area can help eliminate fruit fly by practicing a few simple measures, including do not give away or move any fruit or fruiting vegetables, including tomatoes, capsicums, chillies and eggplants unless cooked or preserved.
As well as do not leave fruit or fruiting vegetables on the ground and do not compost any fruit or fruiting vegetables, including those purchased from a shop.
Residents can place all unwanted fruit and vegetables in the green waste bin for normal collection and can report any maggots found in fruit or fruiting vegetables to the fruit fly hotline on 1300 666 010.
At this stage if no further wild flies or larvae are detected it is anticipated that the quarantine at Thevenard will remain in place until at least November 15.