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<em>Bactrocera kraussi</em>

Bactrocera kraussi

Previous scientific names: Dacus (Strumeta) kraussi Hardy, Strumeta kraussi


Morphological – adult

Features include:

  • medium sized species
  • medium sized oval facial spots present
  • postpronotal lobes and notopleura yellow
  • scutum red-brown with irregularly shaped lateral longitudinal pale fuscous to fuscous bands, mesopleural stripe narrow, slightly wider than notopleuron, lateral postsutural vittae present, medial postsutural vitta absent, scutellum yellow with a broad red-brown to fuscous basal band
  • wing colourless or with a pale fulvous tint and a narrow fuscous costal band and broad fuscous anal streak, cells bc and c pale fulvous to fulvous with microtrichia in outer corner of cell c only, abdominal terga III and IV fuscous and tergum V fulvous except for broad oval lateral dark fuscous margins on terga III and IV and broad oval fuscous lateral margins on tergum V
  • posterior lobe of male surstylus short; female with aculeus tip needle shaped (Drew 1989; pers. comm. Drew 2010).

Morphological – larvae

Not available.



BsrI: Data not available

HinfI: Data not available

HhaI: Data not available

Sau3AI: Data not available

SnaBI: Data not available

SspI: Data not available

Vspl: Data not available


Data not available.

Host Range

Bactrocera kraussi has been recorded on 106 hosts from 31 families. These include: Anacardiaceae, Musaceae, Myrtaceae, Oxalidaceae, Passifloraceae, Rosaceae, Rubiaceae, Rutaceae, Sapindaceae, Sapotaceae and Solanaceae (for a full list of recorded hosts see Hancock et al., 2000).


Major commercial hosts:

  • Citrus species (grapefruit, mandarin, orange)
  • Musa species (banana)
  • Mangifera indica (mango)
  • Psidium guajava (guava)

It should be noted that fruit flies are not known to attack hard green bananas (Hancock et al., 2000).

Similar species

Bactrocera kraussi is similar to B. tryoni but differs in having tint only in both costal cells (instead of microtrichia in both), longer less tapered vittae, lateral spots on the abdomen (instead of a wraparound T), narrow mesopleural stripe, broad basal band on the scutellum and dark apices of the femora.

Pest Status

  • Native
  • A minor pest species in North Queensland


Isoeugenol, weaker response to cue lure (Royer 2015).