Raspberry beetle

The raspberry beetle (lat. Byturus) belongs to the order Coleoptera and the family Byturidae. It is a significant agricultural pest that primarily targets small fruit production, causing substantial losses in both commercial and home garden settings.

The primary host plants for this pest include raspberries and blackberries. Occasionally, these beetles can also be found on strawberries and certain fruit trees, where they feed on developing buds and flowers, disrupting the normal reproductive processes of the plants.

The life cycle involves overwintering as adults in the soil. As temperatures rise in spring, the beetles emerge to feed on young leaves. Once the plants begin to flower, females deposit eggs into the blossoms. The larvae hatch and bore into the fruit, feeding on the drupelets as the raspberry develops.

The damage is characterized by misshapen, small, and crumbly berries that often rot prematurely. The presence of larvae within the fruit makes the harvest unmarketable and unappealing. Infestations often go unnoticed until the picking stage, when the larvae are discovered inside the berries.

Effective pest control requires a multi-faceted strategy. Cultural practices, such as soil cultivation under the bushes to disrupt pupation sites and manual collection of damaged berries, are essential. Chemical control with targeted insecticides should be applied during the pre-flowering stage to prevent egg-laying.