Coffee Bean Beetle (Araecerus fasciculatus)

Identification

Behaviour

Signs of Infestation

Control Methods

Additional Information

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The coffee bean beetle is a major threat to Sri Lanka’s coffee industry, infesting stored coffee beans and causing significant economic losses.

Identification

Physical description: Small, dark brown beetle (around 3mm long) with a distinctive long snout used for drilling into coffee beans. They have characteristic reddish-brown wing covers with lighter spots.
Habitat: Primarily found in stored coffee beans, but can also infest other dried plant materials like cocoa beans and nuts.
Feeding habits: Adults and larvae feed on the inside of coffee beans, creating tunnels and destroying the bean’s quality and marketability.

Behaviour

Life cycle: The coffee bean beetle undergoes complete metamorphosis with four stages: egg, larva, pupa, and adult. The entire life cycle can take as little time as 4-6 weeks under ideal conditions, leading to rapid population growth.
Activity patterns: Adults are mainly active at night but can be active during the day as well.

Signs of Infestation

Visual signs: The presence of adult beetles in stored coffee beans. Look for small exit holes in the beans and powdery frass (insect droppings) around storage containers. Heavily infested beans may become lighter and hollowed out.
Behavioral signs: Reduced coffee bean weight and a decline in coffee bean quality.

Control Methods

Preventative measures: Maintain good sanitation in storage areas, store coffee beans in airtight containers, and regularly monitor for signs of infestation. Maintain proper moisture levels in storage areas as high humidity can worsen infestations.
Fumigation: For severe infestations, fumigation with an approved fumigant by a licensed professional can be highly effective.
Insecticide treatments: In some cases, applying insecticide dusts or sprays to storage areas may be necessary, but this should be done with caution and only by a qualified professional due to potential risks to coffee bean quality.

Additional Information

The coffee bean beetle is a highly mobile insect and can easily spread between storage facilities.
Maintaining good hygiene and sanitation practices throughout the coffee processing chain is crucial for preventing infestations.

Research is ongoing for alternative control methods, such as the use of beneficial insects or pheromone traps, to manage coffee bean beetle populations in a more sustainable way.

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Coffee Bean Beetle (Araecerus fasciculatus)

Identification

Behaviour

Signs of Infestation

Control Methods

Additional Information

Need Help?

Identification

Behaviour

Signs of Infestation

Control Methods

Additional Information

Fumigation

Pest Control Services

Contact

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