Zero catch criteria for declaring eradication of tephritid fruit flies: the probabilities
A. Meats A B and A. D. Clift AA Fruit Fly Research Centre, School of Biological Sciences A08, University of Sydney, NSW 2006, Australia.
B Corresponding author. Email: awm@bio.usyd.edu.au
Australian Journal of Experimental Agriculture 45(10) 1335-1340 https://doi.org/10.1071/EA04108
Submitted: 28 May 2004 Accepted: 13 October 2004 Published: 15 November 2005
Abstract
We examine procedures for declaring an area free of pest fruit flies following an eradication campaign. To date, the acceptable period of trapping zero flies has been calculated without an estimate of the probability of being wrong. The zero trapping periods are usually shorter when declaring local ‘area freedom’ from an endemic fly, than when claiming eradication of an exotic species. We use a model to calculate the probability of zero trap captures and therefore the probability of trapping further flies. The latter probability is always finite. A zero trapping result does not indicate the absence of flies. There must also be evidence of what constitutes a non-viable density, as indicated by the trapping rate. The non-viable densities of certain pest fruit fly species are known from decades of managing small incursions in fly-free zones. There is no need for implementation of eradication procedures if the trapping rate is sufficiently low, in these areas. For a given density of flies (defined in terms of expected mean catch per trap per week), the probability of zero trap captures reduces with time and the number of traps employed. If the model calculations use a non-sustainable density (inferred from trapping rate) then we may declare the actual density of flies to be less if the trapping result is zero for a given number of weeks with a given number of traps when the model predicts the probability of such a result to be sufficiently low, according to a criterion that is selected at a level suited to the purpose of the declaration.
Additional keywords: invasions, incursions, Allee effect, extinction.
Carey JR
(1996) The incipient Mediterranean fruit fly population in California: implications for invasion biology. Ecology 77, 1690–1697.
Clift AD, Meats A
(1998) The relation of ‘percentage positive traps’ to the negative binomial distribution and to progress in the eradication of Bactrocera papayae Drew and Hancock (Diptera: Tephritidae) in northern Queensland. General and Applied Entomology 28, 61–64.
Cunningham RT, Couey HM
(1986) Mediterranean fruit fly (Diptera: Tephritidae): distance/response curves to trimedlure to measure trapping efficiency. Environmental Entomology 15, 71–74.
Fisher KT,
Hill AR, Sproul AN
(1985) Eradication of Ceratitis capitata (Wiedemann) (Diptera: Tephritidae) in Carnarvon, Western Australia. Journal of the Australian Entomological Society 24, 207–208.
Fletcher BS
(1974) The ecology of a natural population of the Queensland fruit fly, Dacus tryoni. VI. Seasonal changes in fruit fly numbers in the areas surrounding the orchard. Australian Journal of Zoology 22, 353–363.
| Crossref | GoogleScholarGoogle Scholar |
Fletcher BS
(1975) Temperature regulated changes in the ovaries of overwintering females of the Queensland fruit fly, Dacus tryoni. Australian Journal of Zoology 23, 91–102.
| Crossref | GoogleScholarGoogle Scholar |
Iwahashi O
(1977) Eradication of the melon fly, Dacus cucurbitae, from Kume Is., Okinawa with the sterile insect release method. Researches on Population Ecology 19, 87–98.
Koyama J,
Teruya T, Tanaka K
(1984) Eradication of the oriental fruit fly (Diptera: Tephritidae) from the Okinawa Islands by a male annihilation method. Journal of Economic Entomology 77, 468–472.
Krafsur ES
(1998) Sterile insect technique for suppressing and eradicating insect population: 55 years and counting. Journal of Agricultural Entomology 15, 303–317.
Meats A
(1998a) The power of trapping grids for detecting and estimating the size of invading propagules of the Queensland fruit fly risks of subsequent infestation. General and Applied Entomology 28, 47–55.
Meats A
(1998b) Cartesian methods of locating spot infestations of the Papaya fruit fly Bactrocera papayae Drew and Hancock within the trapping grid at Mareeba, Queensland, Australia. General and Applied Entomology 28, 57–60.
Meats A, Khoo KC
(1976) The dynamics of ovarian maturation and oocyte resorption in the Queensland fruit fly (Dacus tryoni) in constant and rhythmic temperature regimes. Physiological Entomology 1, 213–221.
Meats A,
Clift AD, Perepelicia N
(2002) Performance of permanent and supplementary traps for Mediterranean and Queensland fruit flies in South Australia 1975–2001: comparison of male lure and food lure traps. General and Applied Entomology 32, 53–57.
Meats A,
Clift AD, Robson MK
(2003) Incipient founder populations of Mediterranean and Queensland fruit flies in Australia: the relation of trap catch to infestation radius and models for quarantine radius. Australian Journal of Experimental Agriculture 43, 397–406.
| Crossref | GoogleScholarGoogle Scholar |
Plant RE, Cunningham RT
(1991) Analyses of the dispersal of sterile Mediterranean fruit flies (Diptera: Tephritidae) released from a point source. Environmental Entomology 20, 1493–1503.
Steiner LF,
Hart WG,
Harris EJ,
Cunningham RT,
Ohinata K, Kamakahi DC
(1970) Eradication of the oriental fruit fly from the Mariana Islands by the methods of male annihilation and sterile insect release. Journal of Economic Entomology 63, 131–135.
Ushio S,
Yoshioka K,
Nakasu K, Waki K
(1982) Eradication of the oriental fruit fly from Amami Islands by male annihilation (Diptera: Tephritidae). Japanese Journal of Applied Entomology and Zoology 26, 1–9.
Wong TTY,
Whitehand LC,
Kobayashi RM,
Ohinata K,
Tanaka N, Harris EJ
(1982) Mediterranean fruit fly: dispersal of wild and irradiated and untreated laboratory-reared males. Environmental Entomology 11, 339–343.
