Sweet potato weevil

Blosyrus ipomoeae is a species of weevil belonging to the Curculionidae family within the order Coleoptera. This insect is recognized as a specific pest that poses significant challenges to the cultivation of sweet potatoes and related species in affected regions.

The host range of this pest primarily includes plants within the Convolvulaceae family. By targeting the underground and vegetative parts of these plants, the weevil causes substantial physiological stress to the host, directly impacting the yield and health of the crop.

The life cycle involves an egg-to-adult transition that is closely tied to the host plant. The larvae are typically endophagous, meaning they live and feed inside the plant tissue, such as stems or tubers, which protects them from environmental conditions and many contact-based pesticide applications.

Damage caused by Blosyrus ipomoeae is manifested by internal galleries and tunneling in tubers, which renders them unsellable and susceptible to decay. Adults feed on foliage, resulting in marginal leaf notching and reducing the overall vigor of the plant during the growing season.

Effective management strategies require an integrated approach:

• Implementing strict crop rotation protocols to break the pest life cycle.
• Sanitation practices, including the removal and destruction of crop debris.
• Use of systemic insecticides applied at critical periods of adult emergence.
• Regular scouting and monitoring using traps to determine the necessity of intervention.