Caribbean weevil

The Caribbean weevil (Diaprepes famelicus) is a significant agricultural pest belonging to the Curculionidae family within the order Coleoptera. Native to the Caribbean, this insect has become a major concern for citrus growers and plant nurseries due to its high adaptability and the severity of the damage it causes.

The host range of this pest is diverse, primarily targeting citrus species, sugarcane, various legumes, and ornamental plants. The ability of the beetle to thrive on different host plants complicates eradication efforts, making it a persistent challenge in regions where it has become established.

The life cycle follows a complete metamorphosis: egg, larva, pupa, and adult. Eggs are laid in clusters between leaves, which the female glues together. Once hatched, larvae drop to the ground and burrow into the soil to feed on the plant's root system, which is the most damaging phase of their development as it often goes unnoticed until visible symptoms appear.

The damage caused by adults is primarily cosmetic, appearing as leaf margin notchings. However, larval feeding on roots is destructive, as they strip bark from the taproot and main lateral roots. This leads to a decline in tree health, stunted growth, yellowing foliage, and in severe cases, the complete death of the host plant due to root failure and secondary infections.

Management strategies rely on integrated pest management (IPM). Key tactics include applying entomopathogenic nematodes to the soil to target larvae, utilizing sticky traps for adult monitoring and suppression, and timely application of foliar insecticides. Cultural practices such as orchard sanitation and maintaining healthy soil conditions are essential to mitigate the impact of this pest on agricultural yields.