Which statement best describes the damage caused by Japanese beetles?

Leaf skeletonizing is a characteristic form of damage caused by Japanese beetles, which primarily feed on the upper layers of leaves, leaving behind the veins and giving them a skeletal appearance. This feeding behavior affects a wide variety of plants, including ornamentals, fruits, and vegetables. The skeletonizing can weaken the plants but typically does not kill them outright, making it a notable sign of their presence.

In contrast, while complete defoliation can occur, it is generally not the initial or most common indicator of Japanese beetle damage. Root damage is associated with other pests and issues rather than Japanese beetles, which focus on foliage. Flower blight is irrelevant to these beetles, as their feeding does not primarily involve flowers but rather impacts the leaves. Understanding the specific feeding habits of Japanese beetles helps differentiate between their typical damage and that caused by other pests or conditions.