Christopher Adams, Ph.D., postdoctoral researcher in entomology at Michigan State University, checks a line of five pheromone traps for codling moth (Cydia pomonella) in an orchard. Adams and colleagues have found that placing five traps in a line and averaging the catch number from them produces a more reliable sampling of pest abundance, less prone to variability and false positives or false negatives, than a single trap placed on its own. (Photo credit: Christopher Adams, Ph.D.)