Kosztarab, M.P. 1990 3.1.2 Economic Importance.. Armored Scale Insects, Their Biology, Natural Enemies and Control [Series title: World Crop Pests, Vol. 4B]. Elsevier Amsterdam, the Netherlands 688 pp,

Notes: Abstract: Review of economic importance of Diaspididae; main emphasis on pests, but some information given on diaspidids used as biological control agents; some discussion of how damage is caused and what the results are for the plant; method of ranking the degree of infestation by scales is given; also discussion of assessing monetary value of losses from scales with some examples. Keywords: biological control.