Author
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Brenner, Richard |
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Submitted to: Integrated Pest Management Symposium Workshop Proceedings
Publication Type: Proceedings Publication Acceptance Date: 2/14/1995 Publication Date: N/A Citation: N/A Interpretive Summary: Precision targeting is a process of producing a highly precise distribution estimate of pests expressed as a map showing contour lines of pest density (usually shown as a number per unit area or trap), then using this map as a guide for the placement of pest control interventions (e.g., baits, dusts, sprays, etc.). In this manner, the smallest amount of toxicant is used in areas where maximum contact by the pests is likely. Contour maps of pest distribution, prepared before and after interventions, also serve as useful documents to verify efficacy of treatments. These maps also can be prepared using contour lines that express probabilities of exceeding a particular value or safety threshold at any location within the structure. Consequently, precision targeting offers a method of evaluating risks, and can be used to develop sustainable management strategies with reduced risks. Technical Abstract: Precision targeting is a method of determining the total distribution of any parameter of interest, and allocating interventions according to the "target map." Based on geostatistics, precision targeting analyzes the locations and values of observations to discern a pattern of spatial continuity of the observations, then uses this pattern to estimate distributions between sampled locations. The total distribution is then expressed as a contour map showing isolines of equal parameter density. As an environmental management tool, precision targeting is most useful when contour lines are expressed as probabilities of exceeding a given threshold. These probability contours provide a means of estimating risks, and risk-reductions associated with proposed interventions. In studies during the past year, precision targeting has been validated in concept and operation in studies aboard the USS Canopus at King's Bay, Georgia, Naval Station. The value of a national demonstration project on IPM using precision targeting strategies is discussed. |
