An outbreak of Mediterranean fruit fly (Medfly) has been declared at Thevenard in South Australia following the detection of larvae, according to West Coast Sentinel.

This outbreak follows the completion of a successful eradication of a Medfly outbreak in Thevenard which ended in November 2018.

Will Zacharin, the executive director of biosecurity at Primary Industries and Regions SA, said the new outbreak was separate to the current outbreak in Ceduna, which was now extended due to further larval detections. 

A 1.5 kilometer outbreak area has been established around the detection point and quarantine restrictions apply within the Thevenard township.

At this stage, if no further wild flies or larvae are detected it is anticipated that the quarantine in both Thevenard and Ceduna will remain in place until at least April 13, 2019.

The new larval detection within the current Ceduna outbreak area will also see the resumption of organic bait spotting operations in the 1.5km outbreak zone.

Zacharin said PIRSA had commenced an eradication program aimed at eliminating any fruit flies from the outbreak area and nearby surrounds.

South Australia recently announced it would impose hefty fines motorists entering the state with undeclared fruit as part of a crackdown on the pest.