Blair's Pinion

Blair's Pinion (Lithophane leautieri) is a moth belonging to the Noctuidae family, order Lepidoptera. Originally native to the Mediterranean region, this species has expanded its range across Europe, becoming a significant pest for various coniferous trees, particularly those commonly used in urban landscaping and horticulture.

The primary host plants for this species include members of the Cupressaceae family. The most frequently attacked plants are the Monterey cypress (Cupressus macrocarpa), as well as various species of Juniperus and Thuja. These plants are often susceptible to larval feeding, especially in ornamental garden settings.

The biology of the species involves a single generation per year. The insect overwinters in the egg stage, which are typically laid on the foliage or bark of the host plant. Larvae hatch in the spring and feed ravenously on the needles and tender new shoots before descending to the soil to pupate during the summer months.

Damage caused by the larvae manifests as defoliation and the destruction of succulent terminal shoots. Heavy infestations can lead to significant aesthetic damage, branch dieback, and in extreme cases, the overall decline or mortality of the tree, as the plant loses its photosynthetic capacity due to needle loss.

Integrated pest management strategies are recommended for the control of Blair's Pinion. This includes the application of targeted insecticides during the early larval stage, promoting natural predators, and monitoring the trees during early spring. Keeping trees well-hydrated and nourished helps them withstand and recover from larval feeding pressure.