Tuesday, 28 October 2003
D0369

This presentation is part of : Display Presentations, Section Cd. Behavior and Ecology

Characterizing adult corn rootworm spatial dynamics in the South Dakota areawide management site

Wade French1, Laurence Chandler2, Amber Beckler1, and Dave Beck1. (1) Northern Grain Insects Research Laboratory, USDA, ARS, 2923 Medary Avenue, Brookings, SD, (2) Red River Valley Agricultural Research Center, USDA, ARS, P.O. Box 5677, Fargo, ND

Corn rootworms (CRW) are economically and environmentally important pests of corn in the U.S. Corn Belt. We used Geographical Information Systems (GIS) to study the spatial relationships of corn rootworms in the South Dakota Areawide Management Site from 1997 2001. For each year, we calculated class-level landscape metrics on continuous corn, first year corn, and all corn. Based on CRW captured in Pherocon AM yellow sticky traps, we used the inverse distance weighted interpolation technique to create raster map layers of CRW spatial abundance, and focused our analyses on the interpolated maps in relation to topography, soil type, habitat structure, and landscape metrics. We found significant relationships of CRW spatial distribution with vegetation type, soil type, and elevation. We present these relationships with respect to edaphic factors and landscape metrics such as temporal shifts in size, shape, and arrangement of patches. Our research accentuates the potential role for GIS and landscape analyses in insect pest management by providing information on spatially explicit models and finding patterns in the landscape that promote high insect population densities.

Species 1: Coleoptera Chrysomelidae Diabrotica virgifera virgifera (Western Corn Rootworm)
Species 2: Coleoptera Chrysomelidae Diabrotica barberi (Northern Corn Rootworm)
Keywords: Geographic Information System, Pest Management

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