It was found that Seoul suffered the largest damage from the cicada moth, an outbreak pest that occurred in the central region such as the metropolitan area, Yeongseo, Gangwon, and Chungbuk.

When the Forest Service investigated the occurrence of gypsy moth larvae, Seoul suffered 1,656ha of damage, followed by Gyeonggi 1,473ha, Gangwon 1,056ha, followed by Chungbuk and Incheon.

The cicada moth occurs as an adult once a year, lays eggs on the bark of trees, overwinters in the form of eggs, hatches in April, and grows by eating the leaves of trees until mid-June.

The Forest Service reported that the winter death rate was low and the number of hatched populations increased rapidly over the past winter.