Lesser pine shoot beetle

The lesser pine shoot beetle (Tomicus minor) is a destructive bark beetle species within the order Coleoptera and the family Curculionidae. It is a significant forest pest that primarily targets pine trees, focusing its infestation on the upper and mid-trunk sections where the bark is relatively thin.

The primary host for this beetle is the pine (Pinus), with a strong preference for Pinus sylvestris. Damage is twofold: larval galleries disrupt the flow of nutrients beneath the bark, while the adult stage feeds internally within the current year's pine shoots, leading to severe crown thinning.

Its biological cycle typically consists of one generation per year. Adults overwinter in the bark of logs or stumps and emerge in early spring to establish breeding galleries. The females bore into the tree, creating transverse egg galleries. Larvae then feed on the inner bark, leaving distinct patterns that often lead to the tree's death.

The economic impact of Tomicus minor is profound, as it causes massive shoot dieback. When populations reach outbreak levels, the structural integrity of the pine stands is severely compromised, making them susceptible to secondary pests and pathogens that can destroy large forest areas.

• Implement systematic forest sanitation and debris removal.
• Deploy pheromone traps to monitor and reduce local beetle density.
• Utilize trap logs to capture emerging adults during the spring flight.
• Perform targeted logging of infested trees to stop the lifecycle.
• Promote diverse forest structures to increase natural resilience.