通过接种试验确定毛白杨绣球病为毛白杨瘿螨（ＥｒｉｏｐｈｙｅｓｄｉｓｐａｒＮａｌ．）所致。在山西太谷县一年３代，以卵在毛白杨枝条上越冬芽内越冬，越冬代、第一代、第二代成螨分别发生于４月中旬、５月中旬、６月中旬，越冬卵于翌年４月上旬孵化，孵化的幼螨即在越冬芽内为害，使越冬芽一展叶就表现出危害状：叶片变小，皱缩变形，肿胀增厚，重叠密生，卷曲成团，节间缩短，丛生紫红，形似绣球。 Inoculation experiments to determine Populus tomentosa Hydrangea disease caused by Populus euphorbia mites (EriophyesdisparNal.). In Taigu County, Shanxi Province, three generations a year, the eggs overwintering buds of Populus tomentosa winter, the overwintering generation, the first generation, the second generation of mites were occurred in mid-April, mid-May, mid-June, In early April of the following year hatch, hatching of young mites that damage in the winter buds, so that the development of the late wintering buds on the show damage: leaf smaller, shrinkage deformation, swelling thickening, overlapping dense, curly into groups, section Shorten between clusters of purple, shaped like hydrangea.