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.
The Lesser Grain Borer lives in stored grain silos and warehouses.
The Lesser Grain Borer is found throughout Australia.
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.
Many thousands of tonnes of stored grain are lost to this beetle every year in Australia alone.