Definition of cottony-cushion scale in English:
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.
- Icerya purchasi, family Margarodidae, suborder Homoptera
- 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.