Michigan State University researchers compared catch numbers in a line of five pheromone traps spaced closely together versus a single trap on its own in the same orchard, as shown in the illustration above. At each release point (R), 100 male and 100 female codling moths were released. (Image originally published in “Line-Trapping of Codling Moth (Lepidoptera: Tortricidae): A Novel Approach to Improving the Precision of Capture Numbers in Traps Monitoring Pest Density,” Journal of Economic Entomology)