
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)
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.