Strawberry blossom weevil

The strawberry blossom weevil (Anthonomus rubi) is a significant pest of small fruit crops, belonging to the order Coleoptera and the family Curculionidae. It is widely distributed across Europe and is known for causing substantial economic damage to strawberry and raspberry plantations if left uncontrolled.

The primary hosts for this weevil include strawberries, raspberries, and blackberries. By feeding on the internal tissues of the buds, the insect reduces the number of blossoms, directly impacting the final yield of the berries, which can be catastrophic in neglected fields.

The biology of the strawberry blossom weevil is characterized by a specific reproductive behavior. In early spring, the adult beetles emerge from hibernation to feed on young leaves. Once the flower buds begin to form, the females puncture the buds to deposit eggs and then sever the pedicels, causing the buds to wilt and fall.

Damage is easily recognized by the presence of wilted, drooping, or fallen flower buds throughout the plantation. Inside these buds, the larvae hatch and consume the floral parts, effectively completing their development cycle. The new generation of beetles emerges in summer, feeding on foliage before seeking overwintering sites in the soil or under leaf litter.

Effective management requires a combination of horticultural and chemical practices. Growers should prioritize field sanitation, such as removing old leaves and debris, to reduce overwintering sites. During the budding stage, if population thresholds are exceeded, the application of targeted insecticides is necessary, ensuring these treatments are completed before the flowers open to protect bees and other pollinators.