During the mid 1980s, Iowa State University researchers described a sampling program that used yellow sticky traps for monitoring adult corn root worms. The Pherocon AM trap, then available commercially, served as the basis for a sampling program. This program was pro posed as a practical means for commercial corn growers to predict the need for soil insec ticides to protect a subsequent year's corn crop from corn rootworm larval damage. Using this decision tool, farmers were expected to apply insecticides only when needed instead of preventively. Since then, a trap called the Multigard, from an additional supplier, has been used to monitor beetle populations. Both traps are yellow, rectangular cards coated with adhesive. The traps differ in color, however; the Pherocon is canary yellow and the Multigard is a fluorescent yellow.
Jon J. Tollefson
Year of Grant Completion
Tollefson, Jon J., "Calculation of specific economic thresholds for the commercially available yellow sticky traps used for adult corn rootworm monitoring" (1995). Leopold Center Completed Grant Reports. 66.