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Host use and crop impacts of Oribius Marshall species (Coleoptera: Curculionidae) in Eastern Highlands Province, Papua New Guinea

  • P. Wesis (a1), B. Niangu (a1), M. Ero (a2) (a3), R. Masamdu (a4), M. Autai (a5), D. Elmouttie (a3) and A. R. Clarke (a3)...


Oribius species are small flightless weevils endemic to the island of New Guinea and far northern Cape York, Australia. The adults feed externally on leaves, developing fruit and green bark, but their impact as pests and general host use patterns are poorly known. Working in Eastern Highlands Province, Papua New Guinea, we carried out structured host use surveys, farmer surveys, shade-house growth trials and on-farm and on-station impact trials to: (i) estimate the host range of the local Oribius species; (ii) understand adult daily activity patterns; (iii) elucidate feeding habits of the soil dwelling larvae; and (iv) quantify the impacts of adult feeding damage. Oribius inimicus and O. destructor accounted for nearly all the Oribius species encountered locally, of these two O. inimicus was the most abundant. Weevils were collected from 31 of 33 plants surveyed in the Aiyura Valley, and a combination of farmer interviews and literature records provided evidence for the beetles being pestiferous on 43 crops currently or previously grown in the Highlands. Adult weevils had a distinct diurnal pattern of being in the upper plant canopy early in the morning and, to a lesser extent, again late in the afternoon. For the remainder of the day, beetles resided within the canopy, or possibly off the plant. Movement of adults between plants appeared frequent. Pot trials confirmed the larvae are root feeders. Quantified impact studies showed that the weevils are damaging to a range of vegetable and orchard crops (broccoli, capsicum, celery, French bean, Irish potato, lettuce, orange and strawberry), causing average yield losses of around 30–40%, but up to 100% on citrus. Oribius weevils pose a significant and, apparently, growing problem for Highland's agriculture.


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Bar-Zakay, I. (1995) Integrated pest management in (PNG) citrus groves. Unpublished technical report. Library of the National Agricultural Research Institute, Lae, Papua New Guinea.
Clarke, A.R., Armstrong, K.F., Carmichael, A.E., Milne, J.R., Raghu, S., Roderick, G.K. & Yeates, D.K. (2005) Invasive phytophagous pests arising through a recent tropical evolutionary radiation: the Bactrocera dorsalis complex of fruit flies. Annual Review of Entomology 50, 293319.
Ero, M.M., Clarke, A.R., Wesis, P. & Niangu, B. (2006) Pest species of the genus Oribius Marshall (Coleoptera: Curculionidae) in Papua New Guinea. PNG Journal of Agriculture, Forestry and Fisheries 49(2), 3–13.
Greve, J.E., van, S. & Ismay, J.W. (Eds) (1983) Crop insect survey of Papua New Guinea from July 1st 1969 to December 31st 1978. PNG Agricultural Journal 32, 1120.
Marshall, G.A.K. (1956) The Otiorrhynchine Curculionidae of the tribe Celeuthetini (Col.). 134 pp. London, UK, Trustees of the British Natural History Museum
Marshall, G.A.K. (1957) Some injurious Curculionidae (Col.) from New Guinea. Bulletin of Entomological Research 48, 17.
Marshall, G.A.K. (1959) Two weevil pests of coffee in New Guinea. PNG Agricultural Journal 12, 4446.
Moxon, J. (1992) Grey weevil pests of cocoa. LAES Information Bulletin, No. 49. Keravat, Papua New Guinea, Lowlands Agricultural Experiment Station.
Szent-Ivany, J.J.H. (1959) Host plant and distribution records of some insects in New Guinea. Pacific Insects 1, 423429.
Szent-Ivany, J.J.H. & Stevens, R.H. (1966) Insects associated with Coffea arabica and some other crops in the Wau-Bulolo area of New Guinea. Papua and New Guinea Agricultural Journal 18, 101119.
Thistleton, B.M. (1984) Entomology Bulletin: No 30; Oribius weevils. Harvest 10, 3640.
Thomas, R.T.S. & Verloop, C.M. (1962) Host plants and distributions of some grey weevil species of the Tribe Celeuthetini in Netherlands New Guinea. Papua and New Guinea Agricultural Journal 15, 3337.
Waterhouse, D.F. (1997) The major invertebrate pests and weeds of agriculture and plantation forestry in the southern and western Pacific. ACIAR Monograph, No. 44. Canberra, Austraslia, ACIAR.
Wesis, P., Niangu, B., Ero, M., Elmouttie, D. & Clarke, A.R. (2007) Efficacy of five insecticides against Oribius inimicus Marshall and O. destructor Marshall (Coleoptera: Curculionidae). PNG Journal of Agriculture, Forestry and Fisheries 50, 38.
Wilson, K.C. (1977) Preliminary notes on growing apples in the Highlands of Papua New Guinea. Science in New Guinea 5(3), 121126.
Yoon, H.-K. & Wiles, G. (1995) Citrus pest monitoring in the Highlands region of Papua New Guinea (March 1993–February 1994) Technical Report 95/4, Konedobu, Papua New Guinea, Department of Agriculture and Livestock.
Zimmerman, E.C. (1991) Australian Weevils. Vol 5. x+633 pp. Canberra, Australia, CSIRO.
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Bulletin of Entomological Research
  • ISSN: 0007-4853
  • EISSN: 1475-2670
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