McClure, M.S. 1990a 1.1.7 Coevolution of armored scale insects and their host plants: speciation processes.. Armored Scale Insects, Their Biology, Natural Enemies and Control [Series title: World Crop Pests, Vol. 4A]. Elsevier Amsterdam, The Netherlands 384 pp.

Notes: This section discusses the profound effects of host plants and other environmental factors on the morphology and phenology of armored scale insects. Species discussed include Aspidiotus (Diaspidiotus) ancylus, A. nerii, Chionaspis nyssae, Fiorinia externa, Lepidosaphes ulmi, Melanaspis obscura, Nuculaspis californica and N. tsugae.