One of the mysteries of the English language finally explained.
An Australian scale insect with a large fluted cottony egg sac, infesting citrus trees. It threatened to destroy the Californian citrus industry until it was controlled by the introduction of the Australian vedalia beetle.
- ‘In the late 1880s, for example, predaceous ladybird beetles imported from Australia had decimated the cottony-cushion scale insect that was consuming citrus crops in California.’
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