Figure of Eight moth

The Figure of Eight moth (Diloba caeruleocephala) is a member of the Noctuidae family, known in agriculture primarily as a pest of various fruit trees. The moth takes its common name from the distinct white, figure-of-eight marking on its forewings, while its larvae are significant defoliators.

The primary hosts of this pest include trees from the Rosaceae family. These include species such as apple, pear, plum, and cherry. In instances of high population density, the larvae may also feed on other broad-leaved trees, causing notable damage to both ornamental and commercial orchards.

The life cycle of the Figure of Eight moth is univoltine, meaning it produces one generation per year. The insect overwinters in the egg stage, with eggs typically deposited on the bark of twigs. Larvae emerge in the spring, coinciding with the bud-burst stage of the host tree, allowing them immediate access to high-nutrient food sources.

The larval feeding causes severe damage, starting with the destruction of leaf buds and progressing to the skeletonization of mature foliage. This feeding intensity reduces the tree's vigor and can lead to significant yield losses. Young trees are particularly susceptible, as repeated defoliation can hinder their growth and overall development.

Control and management strategies:

• Regular orchard inspections during winter pruning to identify and remove egg clusters.
• Application of targeted insecticides once larval activity is detected in early spring.
• Encouraging natural predators, such as insectivorous birds and parasitic wasps, to inhabit the orchard.
• Utilizing pheromone traps for monitoring flight patterns to time control interventions accurately.