Nigel Cattlin / Rice weevil (Sitophilus oryzae) feeding on Rice (Oryza sativa) grains, a pest of stored grain products.

Solvin Zankl / Wheat weevil (Sitophilus granarius) among wheat grains, captive, Karlsruhe, Germany, October.

Solvin Zankl / Wheat weevil (Sitophilus granarius) among wheat grains, captive, Karlsruhe, Germany, October.

Stephen Dalton / Wheat weevils (Sitophilus granarius) infesting grain harvest, UK

Albert Lleal / Rice Weevil (Sitophilus oryzae) SEM close-up view of weevil on rice grains at 14x magnification

Solvin Zankl / Adult grain weevil (Sitophilus granarius) feeding on grain as another crawls past it, Karlsruhe, Germany.

Nigel Cattlin / Photomicrograph of a maize weevil (Sitophilus zeamais) an important storage pest of grain and corn

Nigel Cattlin / Barley grain weevil (Sitophilus granarius) and severely damaged barley grains from an infested grain store

Nigel Cattlin / Adult grain weevils (Sitophilus granarius) an important storage pest feeding on damaged barley grain