Lafauryana leafroller

The Lafauryana leafroller (Choristoneura lafauryana) belongs to the order Lepidoptera and the family Tortricidae. It is a significant agricultural pest known for its polyphagous feeding habits, capable of impacting both commercial orchards and small-scale plantings across various regions.

This pest affects a wide array of host plants, most notably fruit trees such as apple, pear, and various stone fruits, as well as several berry crops and occasionally grapevine. The larvae exhibit a strong preference for tender plant tissues, which makes them particularly destructive during the early stages of plant growth.

The life cycle of C. lafauryana typically involves multiple generations per year. The insect usually overwinters as a young larva inside a silk cocoon, often hidden under bark crevices or within protected plant debris. Upon the onset of warmer spring weather, larvae emerge to feed on developing buds and young foliage, progressing through several instars before reaching adulthood.

The damage caused by these larvae is distinctively recognized by the rolling and webbing of leaves, where the larvae live and feed. This behavior shields them from predators and pesticides. Beyond foliar damage, the larvae can also directly attack flowers and developing fruits, leaving deep surface scars or internal boreholes that significantly reduce yield and marketability.

Effective management and control strategies include:

• Regular monitoring of adult flight patterns using pheromone traps.
• Timely application of selective insecticides targeting the larval stages.
• Encouraging natural biological control agents, such as parasitoid wasps and predatory bugs.
• Adopting cultural practices, including the removal and destruction of infested leaf clusters and overwintering sites.