A multitude of insects is adapted to the relatively dry environment of stored rice. They not only consume large quantities of grain but they reduce the value by altering the perception of quality. Insect activity also changes the environment in the bin to make it more conducive to fungal growth.
Rice weevils have long snouts with chewing mouthparts at the end.
They are dark brown and about an eighth of an inch in length. Egg, larval, and pupil stages are spent inside the rice kernel. Generally there is only one larva per seed. To the naked eye there is little evidence of damage until the adult emerges from the hollow seed. The rice weevil is capable of flight but can also be transported in infested lots of grain.