Pacific Pests and Pathogens Pacific Pests, Pathogens & Weeds - Mini Fact Sheet Edition

Cashew scale (383) Print Fact Sheet


Common Name

Cashew scale. It is also known as the trilobite scale.

Scientific Name

Pseudaonidia trilobitiformis. It was previously recorded as an Aspidiotus species, and as Pseudaonidia darutyi. [Note, a definitive identification of the scale on citrus from Fiji is awaited. The scale was provisionally identified using photos on orange. It is more usually found on leaves.]

AUTHORS Grahame Jackson & Mani Mua
Information from Diaspididae of the World 2.0 Pseudaonidia trilobitiformis. (; and from Garcia Morales G et al. (2016) ScaleNet: A literature-based model of scale insect biology and systematics. Database. ( Photo 3 MAF PLant Health & Environment Laboratory (2011) Trilobite Scale (Pseudaonidia trilobitiformis). PaDIL - (

Produced with support from the Australian Centre for International Agricultural Research under project HORT/2016/18: Responding to emerging pest and disease threats to horticulture in the Pacific islands, implemented by the University of Queensland and the Pacific Community.

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