Curinus coeruleus

Metallic blue coloration distinguishes this species from most other coccinellids, which typically exhibit red, orange, or yellow with black spotting patterns. The uniform metallic blue sheen is diagnostic within its range.

Citrus production systems; areas where target pest species are established. Specific microhabitat preferences beyond agricultural contexts are not documented.

Native to South America (Brazil: Alagoas, Minas Gerais, Pernambuco, Paraná, Rio de Janeiro, Santa Catarina, São Paulo). Introduced to Middle America, North America (Florida), Oceania, and the Philippines.

Predator of armored scale insects, specifically Florida red scale (Chrysomphalus aonidum). Adults and larvae (3rd–4th instar) consume both armored and unarmored scales, with significantly higher consumption rates on unarmored scales. Adults reared on armored scales subsequently prefer unarmored scales when given a choice.

• Chrysomphalus aonidum - prey (armored scale)Florida red scale; primary prey in citrus systems
• Heteropsylla cubana - preyTarget of introduction in Philippines

Complete metamorphosis with egg, larval, pupal, and adult stages. Larval development occurs on scale prey; 3rd–4th instar larvae have been documented consuming prey. Adults emerge from larvae reared on scale diets.

Predation efficiency is reduced by the physical armor of scale prey, which acts as an initial barrier. Consumption rates increase over time (24–72 hours) as predators overcome this obstacle. Adults show learned or developmental preference for unarmored scales when reared on armored or mixed diets.

Biological control agent of armored scale pests in citrus production systems. Significant consumption of Chrysomphalus aonidum indicates capacity to suppress pest populations, though armor reduces immediate predation efficiency.

Used as an introduced biological control agent for management of Florida red scale in citrus production and Heteropsylla cubana in the Philippines. Potential for suppressing pest populations in agricultural systems where established.

• Other CoccinellidaeMost ladybeetles exhibit red/orange/yellow coloration with black spots rather than uniform metallic blue; Curinus coeruleus distinguished by metallic blue sheen

• biological control
• predator
• citrus pest management
• armored scale predator
• introduced species

• BugGuide
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Biology and Potential of Curinus coeruleus Mulsant, an introduced predator of Heteropsylla cubana Crawford
• Predation of Florida red scale Chrysomphalus aonidum (L.) by the metallic blue ladybeetle Curinus coeruleus (Mulsant)