This gives the leaf a characteristic skeletonized appearance. They tend to do little feeding on thick, tough leaves. The spread of the Japanese beetle is primarily the result of flight of the adults. They can fly as far as 5 miles but 1 to 2 miles is more likely. Usually, they make only short flights as they move about to feed.
Local infestations spread as beetles move to favored food and suitable sites for egg laying.
Life Cycle Egg laying begins soon after adults emerge from the ground and mate. Females leave plants in the afternoon, burrow 2 to 4 inches into the soil in a suitable area, and lay their eggs.