ABSTRACT
Corn rootworms (CRW) (Diabrotica spp. Coleoptera: Chrysomelidae) are serious pests of corn (Zea mays) in the United States and Europe. Control measures for CRW were historically based upon chemical pesticides and crop rotation. Pesticide use created environmental and economic concerns. In 1997, a 5 year areawide CRW management program was established in Žve states to manage CRW populations on a multi-Želd scale to help producers better manage these pests. Spatial data were used to predict areas of infestation, leading to more site-speciŽc management techniques. The goal was to more fully understand the spatial relationships between CRW infestations and physical features of the landscape. Geographical information systems (GIS) and spatial analytical techniques were used to examine relationships between CRW populations and soil texture. This chapter uses CRW (adult) data collected in 1998
11.1 Executive Summary ...................................................................................... 233 11.2 Introduction ..................................................................................................234 11.3 Materials and Data Collection ...................................................................... 235
11.3.1 Field and Insect Trap Locations ....................................................... 235 11.3.2 System Requirements ....................................................................... 235
11.4 Getting Started with ArcGIS™...................................................................... 236 11.4.1 Importing Latitude-Longitude Trap Data ........................................ 237 11.4.2 Symbolizing Map Layers .................................................................. 238 11.4.3 Coordinate Systems and ESRI® ShapeŽles ......................................240
