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EXOTIC FRUIT FLIES Jan Hendrik Venter DoA

EXOTIC FRUIT FLIES Jan Hendrik Venter DoA. The lurking threat. Bactrocera invadens Bactrocera cucurbitae Bactrocera zonata Entry risk: Johannesburg, Cape Town, Durban, Beitbridge and Lebombo

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EXOTIC FRUIT FLIES Jan Hendrik Venter DoA

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  1. EXOTIC FRUIT FLIES Jan Hendrik VenterDoA

  2. The lurking threat • Bactrocera invadens • Bactrocera cucurbitae • Bactrocera zonata • Entry risk: Johannesburg, Cape Town, Durban, Beitbridge and Lebombo • Establishment risk: KwaZulu Natal, Mpumalanga and fruit producing areas in the Western Cape

  3. B invadens First detected in 2003 Described in 2005 It has been detected in 22 African countries From East to West Africa As far South a Northern Angola and Southern Tanzania

  4. Damage • B. invadens is an aggressive invader • Attacks several fruit species even wild fruit • Major hosts are Mango, Guava and Citrus • Not known to occur on deciduous fruit • In Senegal up 30% Mango losses • Also high losses in Kenya

  5. Why important to SA • Will affect fruit production for the small farmer • Cause the loss of export markets • No mitigation treatment has been tested for the species • None of our current export markets has the fruit fly • It is in our interest to survey

  6. B. zonata • In Egypt and islands • Attacks stone fruit • Aggressive invader • Originally from India • Able to establish in a Mediterranean climate • Spread to US 2006 and was eradicated due to early detection

  7. Surveillance • POE surveillance • Production area surveillance • Early detection is an advantage • Sound pest awareness a must • Eradication only an option if detected early

  8. RESPONSIBILITIES • We all are responsible • We need to work together • We need to share information • We need to report ASAP

  9. Conclusion • Detection ability increased with surveillance • Better prepared for incursions • Share costs and responsibilities • Integrated approach works

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