Which stored grain infesting weevil is known not to fly?

The granary weevil is known for its inability to fly, which distinguishes it from other varieties of weevils that infest stored grains. This characteristic affects its behavior and distribution since it typically relies on transport by humans or other means to find new food sources rather than dispersing through flight.

In contrast, the rice weevil, black weevil, and bean weevil have the capability to fly, allowing them to spread more easily in environments where grains are stored. The granary weevil's lack of flight adaptation means that once it infests a grain storage area, its population may grow steadily due to favorable conditions without the risk of being dispersed away by its own movement. Understanding the biological behaviors of these pests is crucial for developing effective pest management strategies in grain storage facilities.