Black pine pimples are caused by pine gall moth larvae, which mainly harm the new main branches of young trees and the annual lateral branches on the trunk, while old trees are rarely harmed. Larvae will eat and live under the bark, which will lead to fat loss. In severe cases, some branches will be deformed, and the trunk will branch, bend and die, which may also lead to multi-pointed or bad shape.

Black pine is a plant of Pinus in Pinaceae. Also known as white bud pine, evergreen tree, up to 30 meters high, with gray-black bark. April flowers, single flowers. The female flower is born at the top of the new bud and is purple. Most kinds of scales (carpels) are arranged in a spherical shape. When mature, most pollen floats out with the wind. In the autumn of the following year, cones were formed, scales cracked, seeds scattered and seeds with thin wings. There are short thorns on the navel of the fruit scale. Native to the south coast of Japan and South Korea.