White pine cone borer

Cydia toreuta, commonly known as the white pine cone borer, is a moth species belonging to the family Tortricidae. This pest is a significant concern for forestry, as it specifically targets the reproductive structures of coniferous trees, particularly the genus Pinus.

The primary hosts of this insect are various pine species, including the Scots pine. The larvae are specialized feeders that inhabit the cones, consuming the developing seeds and internal tissues, which directly impacts the natural regeneration and seed harvest potential of forest stands.

The life cycle of the cone borer is synchronized with the phenology of its host tree. Adult moths emerge in the spring, and females deposit eggs on the surface of young cones. Upon hatching, the larvae bore into the cone, where they feed throughout the growing season, completing their development within the protected cone structure.

The damage caused by Cydia toreuta is often characterized by the presence of frass and entry holes on the cone scales. In cases of severe infestation, the larvae can destroy a vast majority of the seed crop within a stand, rendering the cones useless for commercial seed collection or natural forest succession.

Integrated pest management (IPM) strategies for controlling Cydia toreuta include:

• Sanitation, involving the collection and destruction of infested cones before the next generation emerges.
• Using pheromone traps to monitor adult populations and determine optimal timing for interventions.
• Application of targeted insecticides during the larval hatching period.
• Encouraging the presence of natural biological control agents, such as parasitoid wasps and predatory beetles.