Foreign grain beetles primarily feed on:

Foreign grain beetles are primarily mycophagous insects, meaning they are known for their diet consisting mainly of fungal growth. These beetles are often found in environments where mold or mildew is present, particularly in stored food products. Their life cycle and feeding habits are closely associated with the presence of fungi, which they consume as a critical part of their diet.

While foreign grain beetles may occasionally be found in environments that contain stored flours, grains, or dry fruits, their primary attraction is to the mold that may develop on these materials rather than the materials themselves. This relationship with fungal growth highlights their role in the ecosystem as decomposers and indicates why they are drawn to stored food products, as these can harbor mold. Understanding this feeding behavior is essential for effective pest management since it informs strategies to control their populations by managing fungal conditions in storage areas.