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Pest Problems? Call us now (02) 4567 8976 or contact us

Merchant Grain Beetle

Oryzaephilus Mercator
  • Merchant Grain Beetle
    Merchant Grain Beetle
The adult beetle is dark brown. Length is approximately 2.5mm to 3mm. It has a slender, flattened body. The adult can fly (although it rarely does).
Merchant grain beetles are found in pantries or in food processing areas or warehouses.

Both larvae and adults will feed upon grain. Weevil-damaged grain can be readily recognised by the presence of large holes which are the exit holes of the emerging adults.

The females lays about 300 eggs in her lifetime. Eggs are dropped loosely among grain kernels or tucked into a crevice in a kernel. The tiny eggs are slender and white, and hatch in three to five days when environmental conditions are optimal . The larvae emerge and crawl freely about the grain to feed on broken kernels. Larger larvae may tunnel into kernels to feed. Total development from egg to adult requires about three to four weeks.
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