Pacific Pests, Pathogens and Weeds - Online edition

Pacific Pests, Pathogens, Weeds & Pesticides

Breadfruit (Seychelles) scale (242)

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  • Widespread distribution. Especially woody plants. Common on avocado, breadfruit, Casuarina, citrus, Ficus, guava. Hosts occur in more than 60 plant families. Many hosts. An important pest.
  • Females produce living young. Males rare.
  • Outbreaks cause leaves to yellow and shoots to die.
  • Honeydew from these sap-sucking scales falls onto leaves and fruits, to be turned black by fungal moulds.
  • Natural enemies: ladybird beetles (Rodolia) important.
  • Cultural control: prune infested stems, branches and fruits, and burn; add fertilizer, manure or compost to improve tree health; assist natural enemies: destroy ants' nests (hot water), prune low branches, and weed.
  • Chemical control: soap, white or horticultural oils; priority is to remove ants to let natural enemies work: use synthetic pyrethroids.
Common Name

Seychelles scale, silvery cushion scale, breadfruit mealybug

Scientific Name

Icerya seychellarum

AUTHOR Grahame Jackson
Information from CABI (2020) Icerya seychellarum (Seychelles scale). Crop Protection Compendium. (; MAF Plant Health & Environment Laboratory (2011) Seychelles Fluted Scale (Icerya seychellarum): PaDIL -

Produced with support from the Australian Centre for International Agricultural Research under project PC/2010/090: Strengthening integrated crop management research in the Pacific Islands in support of sustainable intensification of high-value crop production, implemented by the University of Queensland and the Secretariat of the Pacific Community.

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