Pecan bud moth

Systematic position: The pecan bud moth (Acrobasis caryae) belongs to the order Lepidoptera and the family Pyralidae. It is a specialized pest that has evolved to feed primarily on trees within the genus Carya.

Host plants: The primary host is the pecan tree (Carya illinoinensis). Infestations can be particularly severe in commercial orchards, leading to significant economic losses due to decreased nut production and diminished tree vigor.

Biology and life cycle: The insect overwinters as a young larva inside a silken hibernaculum located in the crevices of bark or at the base of buds. As spring temperatures rise, the larvae emerge to feed on the swelling buds. The life cycle involves multiple generations per year, with the larvae developing through several instars before pupating.

Damage and severity: Larvae destroy the growing tips and buds, preventing proper leaf and flower development. This results in stunted growth and a substantial reduction in the potential fruit yield. In later stages, larvae feed on developing foliage, webbing leaves together and causing significant defoliation in severe infestation cases.

• Monitoring adult populations using pheromone traps.
• Applying targeted insecticides during the spring larval emergence period.
• Implementing orchard sanitation practices to remove overwintering sites.
• Encouraging natural biological control agents.
• Regular scouting of orchards for early signs of bud damage to determine treatment thresholds.