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Granary Weevil
Image by USDA-ARS-GMPRC Image Database - License: Public Domain. (view image details)
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Granary Weevil larva
Image by USDA-ARS-GMPRC Image Database - License: Public Domain. (view image details)
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GRANARY WEEVIL FACTS |
Identification
The Granary Weevil is a small dark brown weevil with a long snout, elongated oval dimples on the thorax and ridges along the wing covers. The head and thorax is nearly as long as the wing covers. It is similar to the Rice Weevil (Sitophilus oryzae) which is slightly smaller, and has four reddish brown spots on the wing covers and round dimples on the thorax rather than oval. The Granary Weevil is wingless whereas the Rice Weevil has wings and can fly. The larvae are white or creamy white grubs with a small light brown head.
Other Names
Grain Weevil, Wheat Weevil
Size
adult weevil length 3mm to 5mm
Food
The Granary Weevil is a serious pest of grain including wheat, oats, rye, barley, rice and corn.
Breeding
The female weevil bores a tiny hole in the grain kernel and deposits an egg inside. The larva develops and pupates within the grain kernels and is rarely seen. The adult weevil emerges from the pupa and cuts an exit hole to emerge. The exit holes of the Granary weevil are larger than those of the Rice weevil, and are more ragged edged.
Range
exotic pest species found throughout Australia
Classification
| Class: | Insecta | | Order: | Coleoptera | | Family: | Curculionidae | | Genus: | Sitophilus | | Species: | granarius | | Common Name: | Granary Weevil |
Relatives in same Genus
Rice Weevil (S. oryzae)
Greater Rice Weevil (S. zeamais)
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