Granary Weevil

The granary weevil (Sitophilus granarius, Sitophila granaria, Calandra granaria) is a beetle from the weevil family. It is one of the most dangerous storage pests, feeding on cereal grains and causing significant damage to stored goods.

Characteristics of the grain weevil

The grain weevil is a synanthropic species that only occurs in warehouses where it feeds on grain. It does not occur in nature and its spread depends on the transport of grain by humans, as the weevil cannot fly.

Morphology

The grain weevil is between 2 and 5 mm long, depending on the storage conditions. The size of the insect depends on the temperature, humidity and type of grain in which the larva develops – they are smaller in smaller grains such as millet or sorghum and larger in larger grains such as corn. The body of the weevil is elongated, cylindrical and dark brown, with dotted covers and a chitinous carapace that makes it crush-resistant. The lack of membranous wings prevents it from flying. The head is elongated into a long snout with a well-developed mouthpart and a pair of antennae.

Granary Weevil

The granary weevil (Sitophilus granarius, Sitophila granaria, Calandra granaria) is a beetle from the weevil family. It is one of the most dangerous storage pests, feeding on cereal grains and causing significant damage to stored goods.

Characteristics of the grain weevil

The grain weevil is a synanthropic species that only occurs in warehouses where it feeds on grain. It does not occur in nature and its spread depends on the transport of grain by humans, as the weevil cannot fly.

Morphology

The grain weevil is between 2 and 5 mm long, depending on the storage conditions. The size of the insect depends on the temperature, humidity and type of grain in which the larva develops – they are smaller in smaller grains such as millet or sorghum and larger in larger grains such as corn. The body of the weevil is elongated, cylindrical and dark brown, with dotted covers and a chitinous carapace that makes it crush-resistant. The lack of membranous wings prevents it from flying. The head is elongated into a long snout with a well-developed mouthpart and a pair of antennae.