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Japanese Beetle
Description and Habits
Adult Japanese beetles are seven-sixteenths of an inch long and are metallic green with copper-brown wing covers. A row of white tufts (spots) of hair project from under the wing covers on each side of the body. Adults emerge from the ground and begin feeding on plants in June. Activity is most intense over a four- to six-week period beginning in late June, after which the beetles gradually die off. Individual beetles live about 30 to 45 days.

Feeding
Japanese beetles feed on about 300 species of plants, devouring leaves, flowers and overripe or wounded fruit. They usually feed in groups, starting at the top of a plant and working downward. The beetles are most active on warm, sunny days, and prefer plants that are in direct sunlight. A single beetle does not eat much; it is group feeding by many beetles that results in severe damage.

Adults feed on the upper surface of foliage, chewing out tissue between the veins. This gives the leaf a lace-like or skeletonized appearance. Trees that have been severely injured appear to have been scorched by fire. Japanese beetles may completely consume rose petals and leaves with delicate veins. Odors emitted from beetle-damaged leaves seem to be an important factor in the aggregation of beetles on particular food plants.

Mobility
Adult Japanese beetles are highly mobile and can infest new areas from several miles away. Usually, however, they make only short flights as they move about to feed or lay eggs.

More Information
Grubs
Adult Japanese Beetle
Japanese Beetle Trap
Learn more about the Japanese beetle's life cycle. If you have any questions or comments, please feel free to contact us at (716) 875-8822.

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