The invention provides compositions for attracting stink bugs, which include at least one pheromone and at least one synergist. The synergist is a naturally-occurring phytochemical compound. The pheromone is preferably methyl (2E,4Z)-decadienoate, ethyl (2E,4Z)-decadienoate, methyl (2Z,4E)-decadienoate, or methyl (2E,4E)-decadienoate and the synergist is preferably geraniol. The invention also provides traps containing the composition for attracting stink bugs, and methods for attracting, capturing, killing or sterilizing stink bugs using the composition.