Pacific Fruit Fly Project

Pacifly is the Pacific 's fruit fly web page which contains information about economic and non economic species of fruit flies in all the Pacific Island Countries and Territorries. Fruitflies are serious pests throughout tropical and sub tropical countries. They constitute of one of the worlds major insect pest in fresh fruits and fleshy vegetables. In every PICT, there is at least one damaging endemic fruit fly species present. Fruitflies cause direct losses to  fruit production and  in instances  where exotic species became established in a country, very expensive eradication programes had to be carried out. The Pacifly aims to provide detailed information of everything related to Fruit flies.

Dacus solomonensis (Malloch)
Monday, 21 January 2013 14:33


Dacus solomonensis
(Photo: S. Wilson)
Drawing of D. solomonensis (Drawing: M. Romig)

DISTRIBUTION: Bougainville Province in Papua New Guinea and all Solomon Islands Provinces except, Rennell-Bellona and Temotu.

BIOLOGY: Laboratory colonies are kept in Solomon Islands for life history studies and future heat tolerance research. Larvae are reared in whole fruits of snake gourds. At 25°C, eggs start hatching after 46 hours and larval development takes about 12 days in pumpkin and snake gourd. Pupal period lasts about 9 days and adult mating starts about 16 days after adult emergence.

ECONOMIC IMPORTANCE: In Solomon Islands, D. solomonensis and melon fly are collectively responsible for over 90% damage on snake gourds and 60-87% damage on pumpkin.

MALE LURE: Cue-lure.

QUARANTINE SURVEILLANCE: Cue-lure trapping and regular host fruit surveys of Cucurbitaceae.

OPTIONS FOR RESPONSE (If newly discovered in a country): Increased trapping, increased host fruit sampling, restriction of fruit movement, protein bait spraying, male annihilation.

CONTROL: Protein bait spraying, destruction of fallen and overripe fruits, early harvest of mature green fruits.

HOST PLANTS: Usually plants in the family Cucurbitaceae. Hosts recorded in surveys in Solomon Islands are:

Plant families

Plant species




Cucumis sativus




Cucurbita pepo



CUCURBITACEAE Luffa aegyptiaca Luffa or spongy gourd



Trichosanthes cucumerina

Snake gourd



Calophyllum inophyllum

Indian laurel


Sources of published host data:

Drew, R.A.I. 1989. The Tropical Fruit Flies (Diptera: Tephritidae: Dacinae) of the Australasian and Oceanian regions. Memoirs of the Queensland Museum. 26: 1-521.
Drew, R.A.I. and M. Romig. 2001. The Fruit Fly Fauna (Diptera: Tephritidae: Dacinae) of Bougainville, the Solomon Islands and Vanuatu. Australian Journal of Entomology. 40. 113-150. 
Leblanc, L. 2000. Fruit Flies in Solomon Islands. SPC Pest Advisory Leaflet No 30. 4pp.
Vagalo, M., Hollingsworth, R. and F. Tsatsia. 1997. Fruit Fly Fauna in Solomon Islands. pp. 81-86 in: Allwood, A.J. and R.A.I. Drew. Management of Fruit Flies in the Pacific. ACIAR Proceedings No 76. 267p.


Drew, R.A.I. 1989. The tropical fruit flies (Diptera: Tephritidae: Dacinae) of the Australasian and Oceanian regions. Memoirs of the Queensland Museum. Volume 26. 521 pp. (Description and illustration). 
Tsatsia, F., Hollingsworth, R. 1997. Rearing techniques for Dacus solomonensis and Bactrocera cucurbitae in Solomon Islands. pp. 157-160 in: Allwood, A.J., and Drew, R.A I., Management of fruit flies in the Pacific. ACIAR Proceedings No 76. 267pp.