Coyier, D.L., & Roane, M.K. 1986 . Compendium of Rhododendron and Azalea Diseases. APS Press (The American Phytopathological Society) St. Paul, MN 65 pp.

Notes: Scale species discussed include Eriococcus azaleae, Pseudococcus longispinus, Pulvinaria ericicola and P. floccifera.