Lagria rubiginea

Lagria rubiginea is a species of beetle belonging to the Tenebrionidae family within the order Coleoptera. These beetles are characterized by a densely hairy body surface, giving them a distinct textured appearance, and a coloration ranging from yellowish-brown to a rusty-red hue. Within agricultural contexts, they are recognized as phytophagous insects that can pose risks to various plant species during their adult and larval stages.

This pest affects a diverse array of plants, showing a particular preference for vegetable crops and small fruits. Observations often record their presence on potato plants, tomatoes, cucumbers, as well as raspberries and strawberries. The damage is primarily caused by both the adults feeding on the aerial parts of plants and the larvae, which may inhabit the soil or leaf litter, occasionally damaging roots or young seedlings.

The life cycle of Lagria rubiginea involves complete metamorphosis: egg, larva, pupa, and adult. The adults are most active during the summer months, congregating on leaves and flowers to feed and reproduce. The larvae typically develop in the soil or under organic debris, where they go through several instars. This cryptic life stage makes it challenging to detect their presence until visible damage becomes apparent on the crop.

The damage caused by these beetles manifests as irregular holes in leaves, or in severe cases, skeletonization of the leaf tissue. When population densities are high, beetles may also feed on buds and flowers, significantly impacting the reproductive potential of the plants and reducing overall yield quality. The negative impact is often exacerbated during dry periods when the plants' ability to recover from foliage loss is diminished.

Integrated control strategies are essential for managing Lagria rubiginea populations effectively:

• Deep autumn plowing of soil to disturb and reduce larval survival in the field.
• Crop rotation to break the pest's reproductive cycle in heavily infested areas.
• Rigorous weed control around the perimeters of fields to remove alternative food sources.
• Application of suitable insecticides based on monitoring data and economic threshold levels during peak activity.