Monitoring Bactrocera Dorsalis

Status of Bactrocera dorsalis:

• Bactrocera dorsalis(Oriental Fruit Fly) is aquarantine pestof Asian origin capable of infesting various commercial fruit crops (400 recorded hosts). It was previously described as the Invader fruit fly (Bactrocera invadens).
• It is now found in 65 countries and in most sub-Saharan countries.
• In South Africa, the
official pest statusis summarised in Table 1.
• High BD trap counts were recorded in May 2017. Please note that the areas where it is currently absent are vulnerable to point incursions. These areas should be extra vigilant.

Why monitor:

• Keeping it out of your regionis by far the most cost-effective and viable option. Early detection enables the implementation of an eradication programme.
• Monitoring in regions where BD is present is a requirement for the control of BD.
• Monitoring of BD and recording of data is a
requirement for any special programme(e.g. Exports of Peach & Nectarines to the European Union).
• Previous years BD monitoring records to be submitted to DAFF as part of the orchard registration process.

What do I do if I get a BD in a trap:

• Notify FruitFly Africa– Contact person: Eloise du Plessis: 021 882 9541, eloise@fruitfly.co.za
• Place specimen in a closed plastic vial and send it to FruitFly Africa for identification.
• If confirmed to be BD – a delimiting survey will be instituted.
• A 5km radius of a trap will be placed under quarantine.
• A “Removal Permit” is required to move fruit from the quarantine area to a non-infested area. Fruit trading may, therefore, continue in compliance with established additional risk mitigation procedures.
• If no further BD found for 12 weeks – quarantine lifted and area declared “pest free”.
• If a second BD is found in the delimited area an eradication programme will be initiated.
• Eradication control measures (MAT Blocks, Protein Baits, sanitation) implemented for 8 weeks.
• Monitor for further 4 weeks – If no further BD catches the quarantine lifted and area declared “Eradicated”.

Monitoring Guidelines:

Table 1: Official status of Bactrocera dorsalis in South Africa for each province in separate district municipalities.

Province	District Municipality	Status
Limpopo	Vhembe**	Present and subject to official control
Mopani**	Present and subject to official control
Capricorn**	Present, only in some areas where host crop(s) are grown, and subject to official control
Sekhukhune**	Present, only in some areas where host crop(s) are grown, and subject to official control
Waterberg**	Present, only in some areas where host crop(s) are grown, and subject to official control
Mpumalanga	Ehlanzeni**	Present and subject to official control
Nkangala**	Present and subject to official control
Gert Sibande	Absent
North West	Ngaka Modiri Molema**	Present only in some areas and subject to official control
Bojanala Platinum**	Present at low prevalence, seasonal in some areas and subject to official control
Dr Kenneth Kaunda	Absent
Dr Ruth S. Mompati	Absent
Gauteng	City of Tshwane**	Present and subject to official control
KwaZulu Natal	iLembe**	Present and subject to official control
King Cetshwayo**	Present and subject to official control
Ugu**	Present and subject to official control
uMkhanyakude**	Present and subject to official control
eThekwini**	Present and subject to official control
Amajuba	Absent
uMgungundlovu	Absent
uMzinyathi	Absent
uThukela	Absent
Zululand	Absent
Northern Cape	Namakwa	Absent
Pixley ka Seme	Absent
John Taolo Gaetsewe	Absent
Frances Baard	Absent
Z.F. Mgcawu**	Transient under surveillance
Free State	All districts	Absent
Eastern Cape	All districts	Absent
Western Cape	All districts	Absent

: A “Removal Permit” is required to move fruit from an infested districts marked with ** to a non-infested area. NOTE