Bondi Junction NSW, Australia
Fact Sheets
2021-09-08T03:13:39.7223456Z
   6
Khapra beetle (483)
Pacific Pests, Pathogens and Weeds
Pacific Pests, Pathogens and Weeds

Summary

  • Restricted distribution. NOT in Australia, New Zealand, nor Pacific islands. Expert identification required. Prefers hot, dry climates.
  • World’s worst pest of stored grains, nuts, pulses, processed products, and a health hazard. Spoilage from larvae: (i) feeding directly and (ii) cast skins and hairs contaminating consignments causing health and decontaminating issues.
  • Larvae reddish-brown, hairy, up to 7mm with brush-like hairs at hind end; adults, 2-3.5mm oval, reddish-brown, with fine hairs on the back. Adults suspend activity (diapause) if conditions unsuitable, for up to 9 months.
  • Spread: infested grains, and other food stuff, processed products, and animal feeds, traded domestically and internationally.
  • Biosecurity: see draft National Khapra Beetle Action Plan 2020-2030 (Australia) to manage threat: (https://haveyoursay.awe.gov.au/khapra-beetle-action-plan).
  • Cultural control: hygiene: clean walls (and fill cracks), floors, vents, bins, and use new sacks; clear up spillages; check frequently for infestations and monitor with pheromone traps.
  • Chemical control: fumigation with methyl bromide (check Montreal Protocol), phosphine, and (in Australia) sulfuryl fluoride for grain and seed storage facilities, and baled hay. Heat (60oC for 30 minutes or 42.5oC for 8 days). Malathion currently approved (in Australia) for infestations in structures and surrounding surface areas.

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