Bactrocera invadens

Bactrocera (Bactrocera) invadens is a species of tephritid fruit fly that is endemic to Sri Lanka and was introduced to Africa, thus named "invadens".^[1] It is considered a pest. To counteract its detrimental effects to the fruit business, the industry resorts to cold treatment in order to get rid of the larvae.^[2]

Bactrocera invadens is similar to Bactrocera (Bactrocera) dorsalis (Hendel), from Southeast Asia and Bactrocera (Bactrocera) kandiensis (Drew and Hancock), from Sri Lanka.

Description

• Male: Its head has a vertical length of 1.62 millimetres (0.064 in); frons length 1.36 times its breadth. Its is red-brown with fuscous around the frontal and orbital setae (which are strong and black). Its ocellar triangle is black. Its face is fulvous with a medium to large oval black spot in each antennal furrow, its length being 0.51 millimetres (0.020 in). Its thorax: scutum with a base colour being mostly dark orange-brown and black; pleural areas are dark fuscous to black with red-brown below the postpronotal lobe. The length of their wings is between 5.4 and 6.9 millimetres (0.21 and 0.27 in). Its abdomen is oval and terga free.^[1]
• Female: The female is as the male except there is no dense aggregation of microtrichia around A1+Cu2; its supernumerary lobe is weak; no pecten present on tergite III. Its oviscape is orange-brown, tending to fuscous apically, while dorsoventrally compressed and tapering posteriorly in the dorsal view. The ratio of length of oviscape to length of tergum V is 0.9:1.^[1]

See also

• Insect anatomy

References

Further reading

• Allwood, A.J., Chinajariyawong, A., Drew, R.A.I., et al. (1999) Host plant records for fruit flies (Diptera: Tephritidae) in south east Asia. Raffles Bulletin of Zoology Supplement 7:1-92.