Michelbacher, A.E., & Hitchcock, S. 1957 Calico scale, Lecanium cerasorum Cockerell on walnuts.. The Pan-Pacific Entomologist 33(1): 15-18.

Notes: This report describes the effects of DDT on the natural enemies of L. cerasorum, as well as parasitism and feeding by the Audubon warbler. L. pruinosum and L. corni are also mentioned.