Rice Weevil (Sitophilus oryzae)

Identification

Behaviour

Signs of Infestation

Control Methods

Additional Control Methods

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Get in touch with one of our experts.

The rice weevil is a major threat to stored grains in Sri Lanka. This destructive pest can devastate rice supplies and cause significant economic losses.

Identification

Life cycle: Complete metamorphosis with four stages: egg, larva, pupa, and adult. The entire life cycle can take as little as a month under ideal conditions, leading to rapid population growth.
Activity patterns: Primarily active at night, but can be active during the day if disturbed.

Behaviour

Physical description: Small, reddish-brown beetle (1/8 inch long) with a characteristic elongated snout. They have six bumps on their wing covers (unlike the similar granary weevil).
Habitat: Primarily found in stored rice, wheat, barley, corn, and other grains. They prefer warm, dry environments.
Feeding habits: Adults and larvae feed on the internal starchy endosperm of grains, leaving behind hollowed-out shells.

Signs of Infestation

Visual signs: Presence of adult weevils in stored grains. Look for small, round holes in grains and frass (insect droppings) resembling fine dust. Heavily infested grains may appear hollowed out.
Behavioral signs: Musty odor from infested grains and increased flying activity around stored products.

Control Methods

Fumigation is a highly effective method for eliminating rice weevil infestations, especially in large storage facilities. Here’s how it works:

Process: A licensed pest control professional will use a fumigant gas, like phosphine, to penetrate sealed storage areas and kill all life stages of the weevil.
Benefits: Fumigation ensures complete eradication from infested products and surrounding areas. It’s ideal for penetrating packaging and reaching hidden weevils.

Additional Control Methods

Additional Control Methods:

Preventative measures: Recommend proper sanitation of storage areas, using airtight containers for grains, and regular inspection for signs of infestation.
Non-chemical control: For smaller infestations, consider using diatomaceous earth dust or airtight storage containers with beneficial nematodes to kill weevils.

809/36, Negombo Road, Mabola, Wattala

+94 77 368 8979

info@ceylonpestcontrol.com

Rice Weevil (Sitophilus oryzae)

Identification

Behaviour

Signs of Infestation

Control Methods

Additional Control Methods

Need Help?

Identification

Behaviour

Signs of Infestation

Control Methods

Additional Control Methods

Fumigation

Pest Control Services

Contact

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