Pacific Pests, Pathogens and Weeds - Online edition

Pacific Pests, Pathogens, Weeds & Pesticides

Vedalia (Rodolia) ladybird beetle (397)

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  • Worldwide distribution. In Oceania. Australia (native), American Samoa, Cook Islands, Fiji, French Polynesia, Guam, Kiribati, New Caledonia, New Zealand, Palau, Tuvalu, Vanuatu. Preys on Icerya species.
  • Eggs, red, laid on or under scales. Larvae (greyish with black spots) feed on scale eggs (in eggsac), crawlers, larvae; adults red-brown, black behind the head, covered in short white hairs.
  • Important biocontrol beetle.
  • Biosecurity: Need to assess risk before introduction: Icerya may be food for native species, and non-target insects may be attacked by Rodolia, although host range is narrow.
  • Management: (i) avoid use of organophosphates, carbamates and synthetic pyrethroids; possible to use spinosad and abamectin if insecticides required to enhance control ; (ii) use sleeve cages to protect populations initially; control ants: (a) stomach poisons (fipronil, Amdro®, borax), (b) growth regulators (methoprene, pyriproxyfen), (c) nerve poisons (bifenthrin, fipronil, imidacloprid). See ( 
Common Name

Vedalia beetle, cardinal ladybird

Scientific Name

Rodolia cardinalis; previously known as Vedalia cardinalis

AUTHOR Grahame Jackson
1Swaine G (1971) Agricultural Zoology in Fiji. Her Majesty's Stationery Office. London; and  Rodolia cardinalis. Wikipedia. (; and Martin NA (2016) Cardinal ladybird - Rodolia cardinalis. (; and Hoddle M (2013) Biocontrol of Icerya with Rodolia in the Galapagos. UC Riverside. (; and from Pacific Invasive Ant Toolkit. ( Photo 1 Katja Schulz, Rodolia cardinalis. Els Poblets, Alicante, Spain. ( Photo2  Vijay Cavale, Icerya purchasi, found on a lemon tree in our garden in Bangalore City, India.( Photo 3 Hectonichus, A larva of Rodolia cardinalis. Genova, Italy. ( Photo 4 Jeffrey W. Lotz, Florida Department of Agriculture and Consumer Services,

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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