Stock flea beetle

Systematic position of this pest: it belongs to the order Coleoptera and the family Chrysomelidae. The species Phyllotreta cheiranthi is a member of the flea beetle group, known for their powerful hind legs which allow them to jump when disturbed, making them difficult to control in field conditions.

Host plants affected by this species primarily include members of the Brassicaceae family. This includes a wide range of vegetables such as cabbage, radish, turnip, and rapeseed. Additionally, the pest thrives on various ornamental plants like Matthiola (stocks), which often serve as an early food source in the spring.

Biology and life cycle are closely tied to temperature fluctuations. Adults overwinter in sheltered areas, such as leaf litter or surface soil layers. Once spring temperatures rise, they emerge to feed on the tender tissues of newly sprouted host plants. Females lay eggs in the soil, and the larvae develop underground, feeding on small roots.

Damage patterns and pest status are characterized by the typical "shothole" appearance on leaves. Adult beetles scrape the upper epidermis and parenchyma, creating small, circular holes. Under favorable weather conditions for the pest, such as dry and warm springs, these beetles can destroy entire seedling populations in a matter of days.

Control measures require a combination of strategies to minimize crop losses. Important practices include:

• Maintaining vigorous plant growth through adequate fertilization and irrigation;
• Using floating row covers for small-scale production;
• Application of appropriate insecticides targeting the adult stage during the early colonization phase.