Silver-green leaf weevil

Systematic position of this insect places it within the order Coleoptera and the family Curculionidae. Known for its distinctive metallic green or silvery appearance, the species is a common inhabitant of temperate ecosystems across Europe and parts of Asia, frequently interacting with managed horticultural environments.

Host plants for this pest are quite diverse, encompassing a wide range of broad-leaved trees and shrubs. The weevil commonly infests fruit trees such as apple, pear, and plum, as well as forest trees like alder, birch, and oak. Its generalist feeding habits allow it to thrive in various landscapes, including commercial orchards and residential gardens.

Biology and life cycle of the silver-green leaf weevil involves a single generation per year. The larvae develop in the soil, where they feed on the root systems of host plants. After overwintering as larvae, they pupate in the soil during early spring, emerging as adults to feed on the foliage of trees just as the new growth begins to develop.

Nature of damage and economic importance are primarily linked to the activity of adult weevils. They feed on the margins of leaves, causing characteristic ragged edges and irregular chewing patterns. While light infestations are often tolerable, heavy outbreaks can lead to significant defoliation, which stresses the tree and can reduce fruit yields if the damage is severe.

Control measures focus on monitoring and management. Common methods include:

• Manual removal of adults from small trees in early morning hours.
• Application of approved contact insecticides when pest levels exceed economic thresholds.
• Soil cultivation around the base of trees to disturb overwintering larvae.
• Encouraging natural predators such as birds and ground beetles to regulate population densities.