Pacific Pests, Pathogens and Weeds - Online edition

Pacific Pests, Pathogens, Weeds & Pesticides

Cassava Amblypelta dieback (019)

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  • Narrow distribution. Southeast Asia, Oceania. On Eucalyptus deglupta and cassava, causing shoot-tip wilt and dieback, nut fall of coconut and pod distortion on cocoa. Also on papaya, mango and passionfruit. Several species. An important pest.
  • Eggs laid on or near to the host; nymphs brown with long legs. Adults similar, up to 20 mm, and winged.
  • Long needle-like mouth parts cause fruit spotting and distortions, fruit drop, stem cankers, and wilts.
  • Natural enemies: encourage ants, e.g., Oecophylla.
  • Cultural control: difficult as a few insects do much damage; early morning handpicking (cassava).
  • Chemical control: PDPs - derris or pyrethrum; or synthetic pyrethroids and malathion.
Common Name

Cassava shoot dieback, coconut premature nut fall

Scientific Name

Amblypelta species. The species on cassava has not been determined.

AUTHORS Helen Tsatsia & Grahame Jackson
Information from CABI (2017) Amblypelta cocophaga (coconut bug). Crop Protection Compendium. ( Photos 1&2 Brisbane Insects and Spiders website. ( Photo 5 Michael Atuai. PNG LNG Livelihood Restoration Team.

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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