Conotrachelus carinifer

Systematic position: Conotrachelus carinifer belongs to the order Coleoptera and the family Curculionidae (true weevils). It is part of a genus widely recognized for its diverse species that impact fruit production, often characterized by distinct morphological features such as a prominent snout and cryptic coloration.

Host plants: This species primarily infests tropical and subtropical fruit trees. It is frequently associated with the Anacardiaceae family, particularly cashew trees. The larvae and adults demonstrate a strong preference for tender plant parts, making nursery stocks and young orchards particularly vulnerable to infestation.

Biology and life cycle: The life cycle comprises egg, larval, pupal, and adult stages. Adults emerge after overwintering and begin feeding on succulent tissues. Following mating, females oviposit into developing fruits. Larvae feed internally within the fruit, disrupting nutrient transport and causing damage that renders the fruit commercially non-viable.

Damage and economic impact: The primary injury is caused by larval feeding, which leads to fruit drop, rotting, and the entry of secondary pathogens. Infested fruits often show characteristic tunneling marks. When left unmanaged, the pest can significantly reduce yield quality and quantity, imposing heavy economic burdens on commercial fruit growers.

Control measures: Effective management strategies require an integrated approach involving biological, mechanical, and chemical components.

• Sanitation protocols: prompt removal and destruction of fallen fruit to stop larvae from pupating.
• Monitoring: using pheromone or light traps to determine population peaks.
• Chemical control: localized application of systemic insecticides during critical development stages.
• Habitat management: maintaining orchard hygiene to reduce overwintering sites.