Raspberry beetle

The Raspberry beetle (Byturus rubi) is a small coleopteran pest belonging to the Byturidae family. It is considered a primary threat to raspberry and blackberry production across Europe and other temperate regions, causing significant economic losses.

This pest mainly targets raspberry plants but can also be found on blackberries, loganberries, and occasionally on the blossoms of various fruit trees. Adult beetles emerge in spring to feed on the tender young leaves and developing flower buds, often causing initial damage before the first fruits appear.

The life cycle of the beetle is synchronized with the phenology of the host plant. They overwinter as adults or pupae in the soil. Once the soil temperature rises, adults move to the plants to feed. After mating, females lay their eggs directly onto the developing flower buds or young fruitlets.

The most severe damage is caused by the larvae, which bore into the developing berries. Once inside, they feed on the receptacle and the fruit tissue. This feeding destroys the structure of the berry, leading to stunted growth, decay, and the presence of larvae inside the fruit, which makes them unmarketable.

• Cultivating the soil around the bushes to disrupt the pupation stage.
• Applying recommended insecticides specifically during the bud stage before bloom.
• Hand-picking and disposing of infested berries during the harvest season.
• Monitoring pest populations using sticky traps or flower color attraction.

Effective management requires a proactive approach that includes regular field monitoring and proper timing of chemical applications. By reducing the overwintering population through cultivation and monitoring adult activity in early spring, growers can significantly lower the infestation level in their fields.