On 25 May 2011 one exotic fruit fly specimen was detected in a Methyl Eugenol baited fruit fly trap in the Weipe area of the Limpopo Province, close to the Zimbabwe border. The NPPO of South Africa initiated a delimiting survey on 6 June 2011 in accordance with the South African Bactrocera invadens Action Plan. Subsequently, another specimen was detected on 15 June 2011 in a separate Methyl Eugenol baited trap, within 3 km from the first detection site.
The fruit fly specimens were identified as Bactrocera invadens by the nominated local fruit fly expert and reported to Directorate Plant Health of the Department of Agriculture, Forestry and Fisheries in accordance with the relevant legislation and National Bactrocera invadens Action Plan. Subsequently, this identification was confirmed by an internationally recognised fruit fly taxonomist.
A risk assessment was conducted and phytosanitary actions were implemented on 6 July 2011 to prevent the movement of fruit from the area under delimitation. Eradication was initiated on 7 July 2011; it includes the application of weekly protein bait sprays and the deployment of male annihilation blocks in the quarantine area. Ground applied male annihilation treatments and air/ground applied protein bait treatments were implemented in the area for a period of at least 8 weeks. Monitoring for the fly continued in the area thereafter to determine eradication success. There were no detections of B. invadens for more than 12 weeks, or three life cycles, after the last fruit fly was detected in the quarantine area. The status of the pest in this area is Absent: Pest eradicated.