Pseudaulacaspis cockerelli

Distinguished from other armored scales by its combination of host associations and geographic distribution. The female produces a white, oyster-shaped or pear-shaped protective cover (test) that is characteristic of the genus Pseudaulacaspis. Specific diagnostic features require microscopic examination of the pygidium (posterior body segment) and associated structures, which bear taxonomically significant characters for species-level identification in Diaspididae. Separation from congeneric species relies on detailed morphological analysis of the perivulvar pores and other pygidial structures.

Occurs in tropical, subtropical, and temperate regions where host plants are cultivated or grow naturally. Found in ornamental plantings, commercial nurseries, agricultural orchards, and naturalized vegetation. The species thrives in warm climates and has established populations in protected environments such as greenhouses in cooler regions.

Widely distributed across multiple continents: Europe (France, Italy, Russia, UK), Asia (Bangladesh, Cambodia, China, India, Indonesia, Japan, Korea, Malaysia, Maldives, Nepal, Philippines, Singapore, Sri Lanka, Taiwan, Thailand, Vietnam), Africa (Aldabra, Comoros, Egypt, Kenya, Madagascar, Mauritius, Mozambique, Reunion, Rodrigues Island, Seychelles, South Africa, Tanzania, Zambia, Zimbabwe), North America (USA: Alabama, California, Florida, Georgia, Hawaii, Kansas, Louisiana, Maryland, Mississippi, Missouri, North Carolina, Oregon, Pennsylvania, South Carolina, Tennessee, Texas, Virginia), Central America & Caribbean (Guatemala, US Virgin Islands), and Oceania (Australia, Federated States of Micronesia, Fiji, Guam, New Caledonia, Palau, Papua New Guinea, Solomon Islands, Vanuatu). Also recorded from Belgium (doubtful) and Corsica, France.

Phloem-feeding sap-sucker that extracts plant fluids using piercing-sucking mouthparts. Feeds on vascular tissues of host plants.

• Nerium oleander - primary hostSource of common name 'false oleander scale'
• Mangifera indica - hostSource of common name 'mango scale'
• Magnolia spp. - hostSource of common name 'magnolia white scale'
• Various palms - hostDocumented host group

Sedentary as adults; females remain permanently attached to host plant after settling. Dispersal occurs primarily through the mobile crawler (first-instar nymph) stage, which actively seeks suitable feeding sites. Wind and animal vectors may aid in longer-distance dispersal.

Herbivore that can cause direct damage to host plants through sap extraction, potentially leading to chlorosis, reduced vigor, and aesthetic damage. May serve as prey for natural enemies including parasitoid wasps and predatory insects, though specific ecological relationships are not well documented.

Economic pest of ornamental plants and agricultural crops. Infestations can reduce plant vigor and marketability of nursery stock. On mango, it is considered a significant pest in some production regions. Management typically involves horticultural oils, insecticidal soaps, or systemic insecticides; biological control options are limited.

• Aulacaspis spp.Similar genus of armored scales with comparable morphology and host associations; distinguished by pygidial characters and specific host relationships
• Other Pseudaulacaspis speciesCongeneric species require microscopic examination of pygidial structures for definitive separation

• scale insect
• armored scale
• Diaspididae
• pest
• polyphagous
• ornamental pest
• agricultural pest

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• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Bembicid Holdings | Entomology Research Museum
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• Encyrtid Holdings | Entomology Research Museum
• Publications | Entomology Research Museum
• Psyllid Movements Revealed Via Gut Content Analysis
• Wasps Used to Combat Citrus Greening Disease are Unlikely to Threaten Non-target Insects
• Pseudaulacaspis cockerelli . [Distribution map].