Pulvinariella mesembryanthemi

(Vallot, 1829)

A soft insect (Coccidae) with a broad global distribution across Mediterranean-type climates and introduced ranges. Documented as a phloem-feeding on ice-plants (Carpobrotus and Mesembryanthemum). Exhibits with summer peaks and winter declines. Currently investigated as a potential biocontrol agent for Carpobrotus in coastal Europe.

Pronunciation

How to pronounce Pulvinariella mesembryanthemi: //pʊlvɪnəˈriːə/ /mɛsɛmbrɪˈænθəmaɪ//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Habitat

Coastal areas with Mediterranean-type climates; strongly associated with plant distribution. reach highest densities during warmer, drier summer months. Sheltered localities may support year-round populations despite sharp winter declines elsewhere.

Distribution

Native to Mediterranean region including Spain, Portugal, France, Italy, Sardinia, Sicily, Corsica, Crete, Malta, Algeria, Turkey, Israel, Egypt. Introduced to Madeira Islands, Canary Islands, United Kingdom, Netherlands, Hungary, Argentina, Australia, New Zealand, Zimbabwe, South Africa, Swaziland, and United States. Distribution modeling indicates continentality index (39%) and soil thermic regimen (38%) as primary determinants.

Seasonality

with peak activity during warmer and drier summer months; sharp decrease in winter.

Diet

Phloem-feeding ; documented on Carpobrotus edulis, Carpobrotus aff. acinaciformis, and Mesembryanthemum . Sap-sucking feeding style. increases significantly under higher nitrogen availability.

Host Associations

  • Carpobrotus edulis - primary for biocontrol studies in NW Spain
  • Carpobrotus aff. acinaciformis - primary for biocontrol studies in NW Spain
  • Mesembryanthemum - implied from epithet and historical records

Life Cycle

; two per year with highest densities occurring in summer. Development slowed by during summer months.

Behavior

Excretes honeydew that attracts mutualists; exceptional cases lead to mould fouling. increases necromass proportion of plant. show strong -dependent responses in survival, development, and .

Ecological Role

Potential biocontrol agent for Carpobrotus ice-plants. by Chalcidoidea (predominantly affecting largest at high densities) and Coccinellidae , which may limit biocontrol . Complex interactions with enemies and mutualist ants.

Human Relevance

Investigated as agent for Carpobrotus edulis and C. aff. acinaciformis in coastal . Efficacy potentially limited by natural enemy pressure.

Similar Taxa

  • Pulvinaria delottoiCo-occurs on plants; distinguished by differential responses to nitrogen and water conditions, with P. mesembryanthemi showing stronger positive response to nitrogen

Sources and further reading