What do foreign grain beetles primarily feed on?

Foreign grain beetles primarily feed on fungal growth. These beetles are closely associated with stored food products and are often found in environments where mold or fungus is present, particularly in grains. Their diet consists of the fungi that may grow on various food sources, making them a concern in agricultural and storage settings. The ability of these beetles to feed on fungal matter allows them to thrive in conditions that might not be suitable for other pests.

While wood shavings, plant leaves, and stored grains could be associated with various pest species, they do not align with the dietary preferences of foreign grain beetles. Their biological adaptation to consume fungal growth highlights their role in the ecosystem, differentiating them from other pests that target grains or plant materials directly.