Amber Beckler

Document Type

Thesis - University Access Only

Award Date


Degree Name

Master of Science (MS)

Department / School



Western com rootworms create economic and environmental concerns in the Com Belt region of the United States. In order to supplement the population control tactics of the areawide program in Brookings, South Dakota, I used GIS and spatial analysis to examine the spatial relationships from 1997-2001 between population dynamics, habitat structure, topography, and soil type. I am using this information to find patterns in the landscape that promote high population density patches. Using the inverse distance weighted interpolation technique, I created surface maps to estimate areas of WCR populations that were collected from emergence and post-emergence traps. For each year, I used these maps to overlay with vegetation, topography, and soil maps to search for any quantitative relationships. Spatial autocorrelation showed that WCR were highly aggregated. Shifts in landscape structure, such as size, number, and arrangement of patches were associated with population abundance and distribution. Contingency analysis showed that population densities are associated with soil texture and elevation.

Library of Congress Subject Headings

Western corn rootworm -- South Dakota -- Geographical distribution Spatial analysis (Statistics)



Number of Pages



South Dakota State University