Coronado-Blanco, J.M., & Ruíz Cancino, E. 1992 La escama de nieve en cítricos de Tamaulipas. [The snow scale on citrus in Tamaulipas.]. Revista de la Universidad Autónoma de Tamaulipas No. 26: 49-50.

Notes: Brief field description of Unaspis citri and the damage it causes to the citrus crop in this part of Mexico. Life cycle, distribution and control are discusssed.