New Zealand Journal of Crop and Horticultural Science
abstracts
Cold disinfestation of citrus (Citrus spp.) for Mediterranean fruit fly
(Ceratitis capitata) and Queensland fruit fly (Bactrocera tryoni)
(Diptera: Tephritidae)
C. P. F. De Lima1
A. J. Jessup2
L. Cruickshank2
C. J. Walsh2
E. R. Mansfield1
1 Department of Agriculture
South Perth, WA 6151, Australia
email: fdelima@agric.wa.gov.au
2 New South Wales Agriculture
Gosford, NSW 2250, Australia
Abstract Cold treatment of citrus (Citrus spp.)fruits to achieve
quarantine levels of disinfestation of fruit flies is a viable alternative
to methyl bromide fumigation for export purposes. A series of trials, using
standard bioassay procedures followed by large-scale export tests, were conducted
on five citrus cultivars at 2°C and 3°C against the Mediterranean fruit fly (MFF)
(Ceratitis capitata) and the Queensland fruit fly (QFF) (Bactrocera
tryoni). The exposure periods required to achieve complete mortality
in >30
000 insects varied with fruit fly species and cultivar. For MFF, control at 2°C
was obtained in 16 days in lemons (Citrus limon) and 18 days
in oranges (Citrus sinensis) and mandarins (Citrus reticulata);
whereas at 3°C, 18 days were required in lemons and 20 days in oranges and
mandarins. For QFF, control was obtained in 14 days in lemons and 16 days in
oranges and mandarins at both 2°C and 3°C. The application of these results
will provide more flexibility for the citrus industry in satisfying quarantine
treatments.
Keywords Mediterranean fruit fly; Ceratitis capitata; Queensland
fruit fly; Bactrocera tryoni; citrus; quarantine treatments; cold storage
New Zealand Journal of Crop and Horticultural Science, 2007, Vol.
35: 39–50
0014–0671/07/3501–0039 © The Royal
Society of New Zealand 2007
H05161; Online publication date 19 February 2007. Received 16
December 2005; accepted 7 January 2007
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