Fruit Fly Complex

Fruit flies are the most important pest group of tropical fruits and vegetables, causing direct damage to fruit and triggering strict quarantine restrictions that block export markets. Bactrocera dorsalis (oriental fruit fly, invasive in Africa since 2003) has become the dominant species across sub-Saharan Africa, devastating mango, citrus, and guava production. Ceratitis capitata (Mediterranean fruit fly) is the world's most economically damaging fruit pest, affecting over 300 plant species.

B. dorsalis: medium-sized fly (8 mm) with clear wings, distinctive T-shaped dark marking on abdomen, and yellow scutellum. C. capitata: smaller (5 mm) with patterned wings (brown bands). Larvae are white, legless maggots (8-10 mm) found inside fruit. Pupae are barrel-shaped, brown, found in soil beneath trees.

• 1

  Set monitoring traps (methyl eugenol for Bactrocera, trimedlure for Ceratitis) to confirm species before harvest

• 2

  Cut suspect fruit open — white legless maggots inside are diagnostic

• 3

  Look for small puncture marks (oviposition stings) on fruit surface

• 4

  B. dorsalis has a distinctive T-shaped dark mark on the abdomen

• 5

  Premature fruit fall under fruit trees is often a sign of heavy infestation

• Small puncture marks (oviposition stings) on fruit surface

• Soft, water-soaked areas around sting sites as fruit ripens

• White maggots inside fruit flesh when cut open

• Premature fruit drop — infested fruit drops before maturity

• Secondary bacterial and fungal rot entering through sting wounds

• Quarantine rejections of export fruit shipments

Fruit Fly Complex can attack 8 crop species.