Bug Identifier
Grain Weevil / Rice Weevil
Community identification

Grain Weevil / Rice Weevil

Sitophilus spp. (e.g., Sitophilus oryzae or Sitophilus granarius)

Order & Family
Coleoptera (Beetles), Curculionidae (True Weevils)
Size
2.0 mm to 4.5 mm (1/8 inch long)
See this bug in the Encyclopedia

Natural Habitat

Pantries, kitchens, grain storage facilities, and agricultural crop fields storing whole grains.

Diet & Feeding

Feeds on whole seeds, cereal grains, rice, wheat, oats, corn, dried beans, and nuts. Larvae feed internally inside seeds.

Behavior Patterns

Adult females drill holes into whole grains, lay an egg inside, and seal it with a gelatinous plug. Larvae develop internally inside the kernel. Adults can play dead when disturbed and are attracted to light.

Risks & Benefits

Harmless to humans and pets as they do not bite or sting. However, they are major household and agricultural pests that contaminate and destroy stored grains and dry food supplies.