Pebble Hook-tip

The Pebble Hook-tip (Drepana falcataria) is a moth of the family Drepanidae. It is a common species found throughout the Palearctic realm, recognized by the distinctively hooked apex of its forewings, which gives it a leaf-like appearance when at rest.

This species is primarily associated with birch (Betula) and alder (Alnus) trees. While it is generally not considered a major agricultural pest, its larvae can cause visible defoliation in forests or ornamental garden plantings during years of high population density.

The life cycle typically spans two generations per year. The insect overwinters as a pupa, protected within a folded leaf secured by silk webbing. Adult moths emerge in the spring, and following mating, females lay eggs on the underside of host leaves, leading to the hatching of larvae that feed throughout the summer.

Larval feeding results in skeletonized leaves or complete leaf margin removal. Because the larvae often reside within leaf shelters they create themselves, they are partially protected from predators and weather. Severe infestations can stress trees, reducing their vigor and overall growth rates.

Management strategies focus on promoting natural predators, such as parasitic wasps and predatory beetles, which help keep populations in check. In high-value areas, insecticides targeting Lepidoptera larvae can be applied if monitoring indicates threshold levels have been exceeded. Proper tree care and maintenance help trees tolerate minor larval feeding.