Animal Species:Lesser Grain Borer

The Lesser Grain Borer is the biggest pest of stored grain in Australia but is not an Australian native. It arrived here before quarantine controls were in place.

Two Lesser Grain Borers

CSIRO © CSIRO

Standard Common Name

Lesser Grain Borer

Size range

3 mm

Distribution

The Lesser Grain Borer is found throughout Australia.

Habitat

The Lesser Grain Borer lives in stored grain silos and warehouses.

Feeding and Diet

Female Lesser Grain Borers lay eggs on a variety of stored grains including wheat, rice and corn. On hatching, the small white grub-like larvae chew their way into the grain to complete the rest of their development. While they are eating the inside of the grain, they push faecal pellets out of the grain. This creates a huge build-up of faeces in the stored grain. After pupating, the adult beetles continue to eat the grain and can fly off to infest other stores. Many thousands of tonnes of stored grain are lost to this beetle every year in Australia alone.

Economic/social impacts

Many thousands of tonnes of stored grain are lost to this beetle every year in Australia alone.

Classification

Species:
dominica
Genus:
Rhyzopertha
Subfamily:
Dinoderinae
Family:
Bostrichidae
Superfamily:
Bostrichidoidea
Suborder:
Polyphaga
Order:
Hymenoptera
Class:
Insecta
Subphylum:
Uniramia
Phylum:
Arthopoda
Kingdom:
Animalia

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Tags borers, beetles, insects, arthropods, invertebrates, identification, wildlife of sydney, pests,