Relationship Between Preentry Sample Size for Quarantine Security and Variability of Estimates of Fruit Fly (Diptera: Tephritidae) Disinfestation Treatment Efficacy

Harte, David; Baker, R. T.; Cowley, J. M.

doi:10.1093/jee/85.5.1560

Cited by 4 publications

(6 citation statements)

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“…Once p is known, it is possible to determine the maximum permissible infestation level to ensure that the maximum pest limit is not exceeded. The sample size (n) required to detect p can then be selected (Baker et al, 1990;Harte et al, 1992). Measurement of p, therefore, consists of sampling n fruit for the presence of fruit flies.…”

Section: Proportion Of Infested Fruit Per Lot Pmentioning

confidence: 99%

“…These values should be obtained before proceeding with the second phase of the efficacy trials. Estimates of lot size, pre-entry sample size, and the value for p are used in determination of the level of post-harvest treatment that is required (Harte et al, 1992).…”

Section: Other Datamentioning

confidence: 99%

“…Initially, the importing country considers all the fruit-fly species arriving at one location on one day. Therefore, the host status (Cowley et al, 1992) of each fruit type from each exporting country must be known. Where one fruit-fly species occurs in several hosts from several different exporting countries, the maximum pest limit must not be exceeded (with confidence a ) in the total collection of fruits that may arrive in the importing country.…”

Section: Application Of the Maximum Pest Limit Conceptmentioning

confidence: 99%

“…Harte et al (1992) provide a method to account for the sample size used in the efficacy trial and, therefore, the variability of the estimate of 4. As additional research data is obtained, more accurate measures of the parameters can be calculated and used in the equations and models of Baker et al (1990) and Harte et al (1992). The maximum pest limit concept allows for these advances in scientific research and is, therefore, dynamic.…”

Section: Application Of the Maximum Pest Limit Conceptmentioning

confidence: 99%

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Measurement of parameters and application of the maximum pest limit concept for importation of hosts of tephritid fruit flies

Cowley¹,

Baker²,

Harte

1993

EPPO Bulletin

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In developing its quarantine policy for the importation of fruit‐fly host material, New Zealand has used the concept of a maximum pest limit. An equation which links the maximum permissible numbers of fruit flies with lot size (N), mean number of mature fruit fly larvae per infested fruit (μ), proportion of infested fruit (p), and treatment efficacy (μ) has been suggested. We discuss the research which is needed to obtain accurate measurements of the parameters in the model. Decisions based on these parameters support the development of a quarantine policy that can be justified scientifically. Methods for collection of biological data to determine μ and p are detailed. It is suggested that efficacy trials to measure φ should be based on dose/mortality assessments. Experimental techniques used in efficacy trials should focus on assessment of variability and determination of confidence limits. Application of the maximum pest limit equation is discussed.

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Section: Proportion Of Infested Fruit Per Lot Pmentioning

confidence: 99%

Section: Other Datamentioning

confidence: 99%

Section: Application Of the Maximum Pest Limit Conceptmentioning

confidence: 99%

Section: Application Of the Maximum Pest Limit Conceptmentioning

confidence: 99%

See 2 more Smart Citations

Measurement of parameters and application of the maximum pest limit concept for importation of hosts of tephritid fruit flies

Cowley¹,

Baker²,

Harte

1993

EPPO Bulletin

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“…Definitions vary depending on the scope and purpose of a study. Within specific management arenas, rare individuals are those organisms within a spatially defined area (e.g., commodity shipment, field, herd, farm, or county) that represent <25% of the total abundance of a species (50) or are associated with <10% of potential hosts, (e.g., 30,59,96). Specification of sampling space and effort will have a significant impact on what might be considered rare at the moment or in the future (50,77,92).…”

Section: Introductionmentioning

confidence: 99%

Strategies and Statistics of Sampling for Rare Individuals

Venette

Moon

Hutchison

2002

Annu. Rev. Entomol.

143

144

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Diverse subdisciplines within entomology recognize the detection of rare individuals as the precursor to effective management of these individuals. Unfortunately, detection methods have often developed on a case-by-case basis, and advances in one subdiscipline have not carried over to similarly related fields. The biology of a particular organism will certainly affect sampling methods, but the underlying principles governing the power of a sampling strategy to detect rare individuals will apply across taxa. Our review of the sampling literature demonstrates the common problem of detecting rare individuals, reviews the fundamentals of probability theory as a foundation for any monitoring program, and discusses the inferences that can be drawn from samples, especially when resources limit sampling efforts. Particular emphasis is placed on binomial-, beta-binomial-, and hypergeometric-based sampling strategies as they pertain to quarantine inspections for exotic pests, veterinary/medical entomology, and insecticide resistance monitoring.

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The Maximum Pest Limit Concept Explained

Hughes

2003

Plant Health Progress

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The maximum pest limit (MPL) concept was developed as a practical method of implementing quarantine security measures against the import of invasive pest species of plants. The MPL itself is simply a threshold upper limit, above which the pest species in question is deemed capable of establishing a population if imported in a consignment of fruit or vegetables. This limit depends on various biological and ecological characteristics of the pest species in question. Important aspects of implementation relate to how treatment and sampling may be combined to reduce the probability that the MPL will be exceeded. If a specified level of treatment efficacy is required (for example, probit nine level), then choice of an appropriate sample size becomes the main problem for regulatory authorities seeking to maintain quarantine security. Accepted for publication 16 December 2002. Published 13 November 2003.

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Relationship Between Preentry Sample Size for Quarantine Security and Variability of Estimates of Fruit Fly (Diptera: Tephritidae) Disinfestation Treatment Efficacy

Cited by 4 publications

References 0 publications

Measurement of parameters and application of the maximum pest limit concept for importation of hosts of tephritid fruit flies

Measurement of parameters and application of the maximum pest limit concept for importation of hosts of tephritid fruit flies

Strategies and Statistics of Sampling for Rare Individuals

The Maximum Pest Limit Concept Explained

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