<i>Discussion</i>: Analysis of codling moth data from the Okanagan Sterile Insect Release Program

Esterby, Sylvia R.; Thistlewood, H. M. A.; Vernon, Bob; Smith, Scott

doi:10.1002/cjs.5550340312

Cited by 3 publications

(3 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We focus on an analysis of the total moth count in the first 14 weeks of summer, 1999 at these 506 sites. For a detailed discussion of the data see Daigle et al (2006); Esterby et al (2006); Nathoo et al (2006); Vernon et al (2006). Interestingly, there are both a large proportion of zeros and several large outlying values in the moth data.…”

Section: Application To Codling Moth Datamentioning

confidence: 91%

See 1 more Smart Citation

Detection of local and global outliers in mapping studies

Ainsworth

Dean

2007

Environmetrics

View full text Add to dashboard Cite

SUMMARYIn mapping studies, extreme risk areas may arise in proximity to one another in a smooth spatial surface. They may also arise as isolated 'hotspots' or 'lowspots', which are quite distinct from those of neighbouring sites. In this paper, we develop spatial methods which encompass both types of extreme risks. The former is modelled by a spatially smooth surface using a conditional autoregressive model; the latter is addressed with the addition of a discrete clustering component, which offers the flexibility of accommodating extreme isolated risks and is not limited by spatial smoothness. The autoregressive component incorporates the spatially correlated risk as a baseline surface, acknowledging that environmental activity, often spatially correlated, influences risk responses. The discrete component identifies hotspots/lowspots of activity beyond the spatially correlated baseline risk surface. Both types of extreme risk are important, but isolated extremes may provide insight into areas with potential of being a centre for future spatially correlated extreme risks. Hence these may be particularly important in terms of surveillance. A Bayesian approach to inference is employed and graphical techniques for isolating extremes are illustrated. Model assessment is conducted via cross-validation posterior predictive checks. Three examples demonstrate the utility of the methods and case studies show the procedures to be useful for pinpointing extreme risks. In addition, sensitivity to priors is investigated.

show abstract

Section: Application To Codling Moth Datamentioning

confidence: 91%

“…The Okanagan Valley Sterile Insect Release (SIR) study investigated autocidal control of these pests (Vernon et al, 2006). The number of wild moths caught in 506 pheromone traps at sites in the Okanagan Valley, British Columbia, was monitored over the summers of 1999 to 2001.…”

Section: Application To Codling Moth Datamentioning

confidence: 99%

Detection of local and global outliers in mapping studies

Ainsworth

Dean

2007

Environmetrics

View full text Add to dashboard Cite

show abstract

“…More complex studies [123] revealed similarly that tree basal diameter (tree age and potential suitability as moth habitat), as well as within-row tree spacing, and elevation above lake level, were consistently related to wild moth count and to proportions of wild and sterile moths captured (overflooding ratio). Wild moth counts were highest: (1) In traditional orchards with large trees; (2) in low elevation sites; (3) in orchards facing north; and (4) were consistently higher in different regions of the study than in others [124]. Some findings are explained by the greatly reduced numbers of codling moth larvae overwintering in modern high-density plantings in comparison with large, old trees [71,125,126], and by the critical importance of such habitat to the persistence of moth populations [127,128].…”

Section: Research Areas Arising From Operational Challengesmentioning

confidence: 99%

Twenty-five Years of Research Experience with the Sterile Insect Technique and Area-Wide Management of Codling Moth, Cydia pomonella (L.), in Canada

Thistlewood

Judd

2019

Insects

View full text Add to dashboard Cite

The advent of novel genetic methods has led to renewed interest in the sterile insect technique (SIT) for management of insect pests, owing to applications in mass rearing and in the production of sterile offspring without use of irradiation. An area-wide management programme for codling moth, Cydia pomonella, has employed the SIT and other management practices over a large area (3395 to 7331 ha) of orchards and neighbouring urban, public, or First Nations lands in British Columbia, Canada, for 25 years. This project is the first to employ the SIT for C. pomonella, and the longest-running application of area-wide techniques for its control, anywhere. It was derived from basic research and applied trials from the 1960s onwards. Many biological challenges were overcome, and lessons learnt, in transferring from small- to large-scale applications of mass rearing and the SIT, with particular regard to Lepidoptera. Research has proven essential to identifying, if not resolving, issues that threaten the implementation and success of any such programme. The major challenges encountered, and the resulting research, are reviewed, as well as future directions. Recommendations are given for application of the SIT as part of any area-wide management programme for C. pomonella.

show abstract