The roles of ground beetles in organic production systems
Jonathan G. Lundgren Center for Ecological Entomology Illinois Natural History Survey
Figure 1. Photograph of Poecilus chalcites adult, a prevalent ground beetle in the Midwest (photographed by Michael Jeffords).
Figure 2. The seasonal abundance of Poecilus chalcites (number of beetles captured per trap per day) in crop fields undergoing three different organic transition strategies in Central Illinois.