• Rice weevils are usually found in,
Grain storage facilities
Food processing plants
Morphology and structure
Adult rice weevil;
• 2mm in length
• Has a long snout
• Dull reddish brown to black with irregular
shape pits on thorax
• 4 reddish spots on elytra
• Legless, humpbacked
• White to creamy white in colour
• Has a small tan head
• White in colour
• Appendages free
• Segments are movable
• Rice weevils are internal feeders.
• The female uses her strong mandibles to
chew a small hole in a grain kernel.
• Rice weevils are active fliers.
• The larva feeds within the kernel and
consumes the endosperm.
• The adult leaves a large, ragged exit hole in
the kernel and feeds on damaged kernels.
• The rice weevil adult gathers and reproduces
in stored grains.
• Removal of infested food products.
• Discarding the heavily infested material.
• Repackaging material in new containers.
• Vacuuming kitchen cabinets.
• Products are placed in the freezer for several
• Clean bins regularly.
• Treat bins with a registered insecticide.
• Properly dispose of any grain debris found
outside of the storage area.
• Apply insecticide.
• Lower the temperature of the commodity to
at least -5°C for a minimum of 12 weeks.