Bower, C.C. 1989 The phenology of Comstockaspis perniciosus (Comstock) (Hemiptera: Diaspididae) in an apple orchard at Orange, New South Wales.. Journal of the Australian Entomological Society 28: 239-245.

Notes: Abstract: Two full generations of this sp. occurred with possible third; minimum of 741 degree-days required to complete a generation; chemical control.