Raspberry beetles

In terms of systematic position, the Byturidae family is quite distinct. These beetles are characterized by their small, oval bodies covered in fine pubescence. They typically grow up to 4 millimeters in length and are usually brown or grayish in color, which allows them to blend in with the stems and buds of the host plants.

The primary hosts for these pests are plants from the Rubus genus. Adults feed on young leaves, flower buds, and petals, causing structural damage that inhibits fruit set. The larvae are the most destructive stage, as they burrow into the receptacle and the fruit itself, rendering the berries unmarketable.

The life cycle begins with overwintering adults in the soil near the base of the host plants. In early spring, as temperatures rise, the beetles emerge and begin feeding on early vegetation. Mating occurs shortly after, and females lay eggs individually on developing flower buds or young fruits. Once the eggs hatch, the larvae tunnel into the berries to feed.

Damage caused by Byturidae is often not immediately visible until harvest. Infested berries are often smaller, misaligned, and prone to rot. Because the larvae remain hidden inside the fruit, they contaminate the harvest with frass, making it unacceptable for fresh consumption or processing, which is a major concern for growers.

• Implementing soil cultivation and hoeing around the base of the bushes in autumn and spring.
• Prompt harvesting of ripe berries to minimize the time larvae spend inside the fruit.
• Using row covers or insect netting to prevent adult beetles from reaching the buds.
• Applying recommended biological or chemical insecticides during the pre-flowering stage.