Large pine weevil

The large pine weevil (Hylobius abietis) is a significant beetle species within the order Coleoptera and the family Curculionidae. It is widely recognized as one of the most destructive pests affecting coniferous regeneration in Europe, frequently causing extensive mortality in newly planted forests.

This pest primarily attacks young coniferous seedlings, including pine, spruce, and larch. The adults feed on the succulent bark of the stem, often stripping it entirely around the circumference, while the larvae typically develop within the roots and bark of stumps from recently felled trees.

The life cycle of the large pine weevil typically spans from one to three years, depending on the environmental conditions and regional temperature patterns. Overwintering occurs both as adults in the forest floor litter and as larvae beneath the bark of stumps or roots, ensuring the population persists across seasons.

Damage caused by this insect is characterized by deep feeding scars on the stems of saplings, which can disrupt the phloem and xylem, leading to rapid yellowing and death of the plant. High infestations on reforestation sites can result in the loss of nearly the entire crop if management strategies are not implemented.

• Pre-planting treatment of seedlings with approved insecticides.
• Removal of stumps or mechanical soil preparation to limit larval breeding grounds.
• Use of bark-based log traps to attract and collect adult beetles during peak periods.
• Implementing biological control measures such as maintaining predator habitats.