There are many different species of beetles found in North America. One common and destructive beetle is the Japanese Beetle.
The Japanese beetle is a common species of beetle. It is about 15 mm (0.6 in) long and 10 mm (0.4 in) wide, with iridescent copper-colored elytra and green thorax and head. It is not very destructive in Japan, where it is controlled by natural predators, but in North America, it is a noted pest of about 200 species of plants including rose bushes, grapes, hops, canna, crape myrtles, birch trees, linden trees, and others.
Due to its nature, being seen as a domestic irritant, Japanese beetle traps have been invented specifically to target the species, of which consists of a pair of crossed walls with a bag or plastic container underneath, and are baited with floral scent, pheromone, or both. However, studies conducted at the University of Kentucky and Eastern Illinois University suggest beetles attracted to traps frequently do not end up in the traps, but alight on plants in the vicinity, thus causing more damage along the flight path of the beetles and near the trap than may have occurred if the trap were not present.
These insects damage plants by skeletonizing the foliage, that is, consuming only the leaf material between the veins, and may also feed on fruit on the plants if present.