What is a key feature of the Confused Flour Beetle?

The Confused Flour Beetle is characterized by its unique segmented club on its antennae, which can be difficult to see. This specific feature is critical for identification and differentiation from other beetle pests. The antennae play a crucial role in the beetle's ability to sense its environment and locate food sources, which are primarily flour and grain products. Understanding this physical trait helps pest control professionals accurately determine the presence of this particular beetle, enabling effective pest management strategies.

In contrast, the other options do not accurately represent the key features or behaviors of the Confused Flour Beetle. It is not notably larger than other beetle pests; it does not have a segmented club that stands out prominently; its diet is not limited to fruits and vegetables; and it does not primarily feed on plastics. Thus, the correct identification of the Confused Flour Beetle hinges on recognizing its antennae morphology, specifically the less visible segmented club.