Polydrusus formosus the green immigrant leaf weevil, is a species of broad-nosed weevil belonging to the family Curculionidae, subfamily Entiminae.

This beetle is present in most of Europe and in the Nearctic realm.

Distribution

The adults grow up to 5–6 millimetres (0.20–0.24 in) long. The colour of this insect is brilliant metallic green, as the black body is coated in emerald round scales. If the scales wear off the body beneath appears dark. Antennae are pale with a dark club. These beetles show a short groove between the eyes and evident striae on the elytra.

Description

Adults can mostly be encountered from April through August. These beetles lay their eggs in the bark or leaves of the host-plants. The soil-inhabiting larvae grow up to 7 millimetres (0.28 in) long feeding on juicy plant roots. In Autumn their development is complete. They overwinter and pupate in Spring.
The adults are eaters of young leaves and open blossoms of a wide variety of woodland trees and shrubs (Corylus avellana, Quercus species, etc.), but also fruit trees (apple, pear, cherry, etc.) They are considered a pest of fruit trees, causing extensive damages to their buds, blossoms and shoots.

Biology

harmful

Polydrusus formosus is considered a tree pest because the adult beetles feed on the leaves of various tree species, causing damage and defoliation, which can weaken the trees and affect their overall health.

tree pest

Polydrusus formosus is considered a garden pest because the adult beetles feed on the leaves of various garden plants, causing damage and defoliation, which can negatively impact the aesthetics and health of the garden.

garden pest

Polydrusus formosus can be considered a crop pest because they have been known to feed on the leaves of certain crops, such as strawberries and raspberries, causing damage and reducing crop yield.

crop pest

Polydrusus formosus is considered a pest because they feed on the leaves of trees, garden plants, and certain crops, causing damage, defoliation, and potential yield reduction, which can negatively impact the health and productivity of these plants.

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What does green Immigrant Leaf Weevil eat?

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