Merchant Grain Beetle, Oryzaephilus Mercator

Oryzaephilus mercator, the merchant grain beetle, is a major pest of oilseeds, such as groundnut, melon, palm kernels and sunflower seeds.

The merchant grain beetle can also feed on and subsequently damage dried fruit and processed cereals.


Oryzaephilus mercator, the merchant grain beetle is widely distributed throughout the globe but is most commonly found in tropical regions and other warmer climates. This species does not survive well in cooler temperatures. The merchant grain beetle prefers to feed on the damaged grain of seeds high in oil however, it is capable of damaging intact grains.