Green leaf weevil

Systematic position: Hypomeces squamosus belongs to the order Coleoptera and the family Curculionidae. This species is a well-known agricultural pest in many tropical and subtropical countries, where its presence poses a significant challenge for local farmers and orchard managers.

Host plants: It is a polyphagous pest, meaning it feeds on a wide range of plants. Key crops susceptible to its attacks include cotton, corn, soybeans, and rice. Additionally, it causes damage to perennial fruit crops such as citrus, mango, coffee, and various ornamental shrubbery in tropical zones.

Biology and life cycle: The adult beetle is covered with tiny green or grayish scales, providing excellent camouflage. The life cycle consists of egg, larval, pupal, and adult stages. Larvae live underground and feed on the root systems of plants, while adults move to the foliage to feed during the daylight hours.

Damage and economic significance: The primary damage is caused by adults consuming leaf margins, resulting in irregular notches and a ragged appearance of the leaves. In cases of high infestation, the pest can defoliate entire plants, which significantly stunts growth, reduces fruit yield, and affects the overall vitality of the crop.

Control measures: Managing Hypomeces squamosus requires integrated pest management (IPM) practices. Recommended strategies include:

• Tilling the soil to disrupt larval development;
• Using sticky traps or manual collection for small-scale gardens;
• Applying systemic insecticides on foliage when thresholds are exceeded;
• Maintaining field hygiene by clearing weed hosts around plantations.