Cypress moth

The Cypress moth (Enarmonia cupressana) is a specialized insect pest belonging to the order Lepidoptera and the family Tortricidae. It is widely recognized as a significant threat to various evergreen plants, particularly those within the Cupressaceae family.

Host plants primarily include various species of Cypress (Cupressus), Arborvitae (Thuja), and Juniper (Juniperus). These plants are common subjects in landscaping, making the pest a frequent concern for arborists and professional gardeners who maintain residential and public green spaces.

The biology of Enarmonia cupressana consists of four stages: egg, larva, pupa, and adult moth. The larvae are the primary damaging agents, typically overwintering inside the bark or shoots of the host tree. During the spring and summer, adult moths emerge, mate, and deposit eggs on the needles or bark surface.

Damage is manifested by the larvae boring into the inner bark and vascular tissue of the shoots. This feeding activity disrupts the flow of water and nutrients, resulting in flagging, yellowing needles, and localized dieback. In severe infestations, the structural integrity and aesthetic value of the conifer are compromised.

Effective management strategies for this pest include:

• Monitoring for early signs such as resin exudation and frass on the bark.
• Pruning and destroying infested plant material to reduce the pest population.
• Applying systemic or contact insecticides during the larval emergence periods.
• Using pheromone traps for early detection of adult moth activity.