Chalcodermus camposi

Chalcodermus camposi is a serious pest belonging to the Curculionidae family, commonly known as weevils. Within the order Coleoptera, this species is recognized for its specific impact on leguminous crops, particularly in the Americas, where it poses a recurring challenge to agricultural productivity.

The primary host for this weevil is the common bean (Phaseolus vulgaris). Adult beetles and their larvae are highly destructive, targeting the reproductive parts of the plant. Without proper management, infestation levels can escalate rapidly during the growing season, potentially leading to substantial financial losses for farmers.

The biology of Chalcodermus camposi is characterized by a cryptic life cycle. Adult females puncture the pods and deposit eggs inside the developing tissue. Upon hatching, the larvae bore into the developing seeds and feed internally. This protected environment makes direct control methods, such as external spraying, difficult to implement during the larval stage.

Damage symptoms include external scarring on the pods and visible boreholes in the harvested beans. Infested seeds often exhibit internal damage, rendering them unmarketable and incapable of germination. Additionally, the feeding wounds serve as entry points for various fungal and bacterial pathogens, which can exacerbate the loss of total yield quality.

Effective management strategies require an integrated pest management (IPM) approach. This includes:

• rotating crops to disrupt the pest's life cycle;
• employing deep tillage after harvest to eliminate overwintering populations;
• regular field monitoring to detect early adult activity;
• applying systemic insecticides at the onset of pod formation.