Pilot study at Cowra of intra-town dynamics of Queensland Fruit Fly (Bactrocera tryoni (Froggatt)) populations based on trap catch data

Peter M. WorsleyA, Bernie C. DominiakA, Arthur R. GilmourB and David G. JamesC

A NSW Department of Primary Industries, Locked Bag 21, Orange, New South Wales 2800, Australia.

B NSW Department of Primary Industries, Orange Agricultural Institute, Forest Road, Orange, New South Wales 2800, Australia.

C Washington State University, 24106 North Bunn Road, Prosser, WA 99350, USA.


We revisit data previously reported by James (1992) relating to variation in Queensland fruit fly numbers at 30 trap locations on a 400 m grid in the town of Cowra during summer of 1991/2. Wild fly numbers were linked to aspect/slope interaction and aspect/altitude interaction. CLIMEX indices and anemometer readings were not significantly linked to wild fly numbers. Sites with a northern aspect, higher slope, lower altitude and preferred host trees appear to be favourable sites for wild flies, particularly with shorter day-length. Wild fly populations were not influenced by sterile numbers, confirming the previous perception. Sterile fly numbers were not linked to any of the examined factors.


Plant Protection Quarterly (2008) 23 (2) 86-89.