aphid
Aphids are insects belonging to the aphids. More than 4,000 species are known all over the world, and 300 species are known in Korea. The body is small, usually 2 to 4 mm, and the body color varies. It consists of three parts: head, chest, and abdomen. There are whiskers, double eyes, mouths, etc. on the head, and antennae are usually six words. The body is very fragile and features a crown on either side of the fifth or sixth ventral back, which forms a cylinder, ladder, and ring.