 | Japanese Beetle – Popillia japonica Family Scarabaeidae – Scarab Beetles / Subfamily Rutelinae Live Japanese beetles photographed at Illinois, Wisconsin, and Pennsylvania, USA. Beetles Main | Beetles Index | Longhorns | Leaf Beetles | Soldier | Blister | Lady |
The Japanese Beetle is oval shaped, with a bright metallic green body and pronotum and brown or reddish-orange elytra. White to grayish hair underneath, with five patches of white hair (setae) along each side if the abdomen, and two tufts of white hair at the rear. This is a very distinctive beetle – nothing else looks like it. Males have pointed tibial spurs, the female's are rounded. Habitat and range: The Japanese beetle can be found in gardens, woods, and open meadows. The beetle is slowly spreading across the U.S. after being accidentally introduced many times in the early 20th century, most notably in 1916 along with roots of imported Iris. [2] |
| Japanese beetles can feed on about 300 species of plants, ranging from roses to poison ivy. Odor and location in direct sun seem to be very important factors in plant selection. The beetles usually feed in groups, starting at the top of a plant and working downward. While a single beetle doesn't eat much; group feeding by many causes severe damage. Adults feed on the upper surface of foliage, chewing out tissue between the veins. This gives the leaf a characteristic skeletonized appearance. A few beetles on plants, or some moderate damage, will bring in more. Japanese beetles apparently produce aggregation pheromones that will attract more males and females to feed and find potential mates. In addition, volatile odors from damaged plants may attract more beetles. |
