Leaffooted pine seed bug

The leaffooted pine seed bug (Leptoglossus corculus) is a significant insect pest belonging to the Coreidae family within the order Hemiptera. These insects are well-known for their unique leaf-like expansions on their hind legs, which give them their common name.

This pest primarily attacks various species of pine trees, focusing its damage on the developing cones and seeds. It is a major economic concern in commercial seed orchards, where it can drastically reduce the yield of viable seeds required for reforestation and commercial forest planting.

The biological cycle of this species is closely linked to the development of pine cones. Adults emerge in spring and feed on the sap of young cones. Eggs are laid in rows on pine needles. The nymphs progress through five instars, and throughout these stages, they pierce the cone scales to feed directly on the developing seeds inside.

The damage caused by these bugs is primarily internal. By inserting their stylets into the seeds, they consume the endosperm and embryo, leaving the seed hollow and non-viable. This damage often goes unnoticed externally until the harvest, when the reduction in seed quality and quantity becomes apparent.

• Regular monitoring of insect populations during cone development stages.
• Strategic application of systemic insecticides within seed orchards.
• Removal and destruction of damaged or infested pine cones.
• Maintaining healthy tree vigor to help them withstand minor infestations.
• Encouraging natural predator populations such as parasitic wasps and birds.