(7) The rice weevil and the granary weevil

Granary weevil

Granary weevil

Rice weevil

Rice weevil

In the tropics and in subtropical areas rice weevils live in areas with rice fields.
It can fly and will often infest rice just before harvest. The granary weevil also lives in the tropics, but it cannot fly and is more common than the rice weevil as we approach the temperate zones. At our latitude, both of these granivorous insects are synanthrope.

The rice weevil requires more heat than the granary weevil to develop and it is not as likely to survive cold winters. In Northern Europe almost all grain stores are infested with granary weevils. Rice weevils are only seen after particularly hot summers.

Based on the British statistics, we can expect that both species separately are imported by about 1% of the loads that reach Northern Europe. Rice weevils in Northern European food mainly come from imported food, especially rice. The granary weevil is a local species.