How does the granary weevil differ from the rice weevil?

The granary weevil is indeed characterized by its inability to fly and the absence of distinct markings, which sets it apart from the rice weevil. The granary weevil's body is smooth and unmarked, allowing them to blend seamlessly into their environment, unlike the rice weevil, which typically has distinct patches and markings on its back.

This difference in flight capability is significant; the granary weevil’s adaptation to not having functional wings is likely due to its lifestyle, where it remains close to its breeding and feeding sites, primarily in stored grain. In contrast, the rice weevil has functional wings and is capable of flying, which aids in its movement and the spread of infestations.

Understanding these differences is crucial for proper identification and management strategies when dealing with these pests in stored agricultural products.