Sunday, 17 November 2002 - 8:40 AM

This presentation is part of : Contour Mapping and Interpretation of Spatial Insect Counts

From traditional to site-specific IPM: Developing sampling plans, choosing interpolators, and resultant map usefulness

Randy Weisz and Shelby Fleischer. North Carolina State University, Williams Hall 2409, PO Box 7620, Raleigh, NC

Entomology has a long and well-established research-base for developing sampling plans for traditional IPM programs. As mapping software in GIS packages becomes more available and easier to use it is tempting to modify these sampling plans and then use them to develop pest density maps for site-specific control. Traditional IPM sampling units are, however, often not appropriate for map development and may result in maps with either poor accuracy, or which are too expensive for practical use. Using intensively sampled Colorado Potato Beetle (Coleoptera: Chrysomelidae) data, five sampling plans and four interpolation methods will be compared for map accuracy, sampling intensity, and ability to make correct over- or under-threshold decisions. Both traditional statistics, and geostatistics that are important for developing spatial sampling plans will be presented. Developing a sampling program that is consistent with the spatial distribution of the pest will be shown to be more important than the choice of map interpolator.

Species 1: Coleoptera Chrysomelidae Leptinotarsa decemlineata (Colorado Potato Beetle)
Keywords: Site-Specific Sampling, Map Interpolation

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