Insect name, LEPIDOPTERA, Coccidae. Distributed in North China, Northeast China, Northwest China, Jiangxi, Sichuan, Shandong, Henan, Hebei, Shaanxi, Hubei, Gansu and other provinces. Larvae mainly feed on elm, elm, elm, elm, elm, elm, elm and elm. The newly hatched larvae only eat mesophyll, then eat holes and nicks. The damaged area is gray and transparent, and the leaves can be eaten up when the damage is serious. Its harm is almost the same as that of American white moth.