Nur, U. 1990a 1.2 Reproductive biology and genetics. 1.2.1 Chromosomes, sex-ratios, and sex determination.. Armored Scale Insects, Their Biology, Natural Enemies and Control [Series title: World Crop Pests, Vol. 4A]. Elsevier Amsterdam, The Netherlands 384 pp.

Notes: Chromosome numbers, polyploidy, chromosome systems and sex-ratio are the topics discussed in this section. The diaspidid system and the Comstockiella system are considered in detail. Species mentioned include Aonidia lauri, Aonidiella aurantii, Aspidiotus nerii, Chionaspis pinifoliae, Chrysomphalus aonidum, Diaspis echinocacti, Furcaspis biformis, F. capensis, Gynandraspis gabonensis, Nuculaspis californica, Odonaspis pencillata, O. saccharicaulis, Parlatoria oleae, P. proteus, P. ziziphis, Planococcus citri, Pseudaulacaspis pentagona, Quadraspidiotus perniciosus and Unaspis euonymi