Pecan bud moth

The Pecan bud moth (Gretchena bolliana) is a destructive pest belonging to the Tortricidae family of the order Lepidoptera. It is specifically recognized as a major threat to commercial pecan orchards, causing severe damage to young foliage and reproductive structures.

The host range is primarily limited to pecan trees (Carya illinoinensis) and related species within the Carya genus. The larvae feed aggressively during the spring and summer months, which coincides with the most critical stages of tree development and fruit formation.

The biological cycle of this pest involves multiple generations per year. The insect typically overwinters in the pupal stage within crevices of the tree bark or debris on the ground. Once temperatures rise, the adults emerge, mate, and deposit eggs on the new growth, starting the infestation cycle.

The damage caused by the larvae is twofold: they first destroy the developing buds, and later tunnel into terminal shoots. This activity causes the tips of the branches to wither, curl, or die, which directly affects the structural integrity of the tree and significantly reduces the total yield of marketable nuts.

Integrated pest management (IPM) for this species relies on a combination of strategies:

• Monitoring adult flight patterns using pheromone traps.
• Applying insecticides targeting the larval emergence stage.
• Sanitation practices, such as removing infested shoots to lower the population.
• Maintaining tree vigor through proper irrigation and nutrient management to withstand pest pressure.