Kentish glory

The Kentish glory (Endromis versicolora) is a distinctive moth belonging to the Endromidae family. While often considered a collector's item due to its beauty and status in some regions, it is formally classified as a foliage-feeding pest that can impact birch populations during years of high population density.

The primary host plants for Endromis versicolora are birch species (Betula). However, the larvae are polyphagous to some extent and may feed on other deciduous trees, including alder (Alnus) and lime (Tilia). The larvae are characterized by their rapid growth rate and voracious appetite during the final larval instars.

The life cycle is univoltine, meaning there is only one generation per year. The insect overwinters as a pupa within a tough, dark brown cocoon, typically situated among the leaf litter or just below the surface of the soil. Adults emerge early in the spring, with males often flying during the day to locate females, which are larger and heavier.

The damage caused by the larvae involves defoliation of the host tree. Younger larvae feed in colonies, causing small holes in the leaves, while older larvae are solitary and consume entire leaf blades, leaving only the midribs. Severe infestations result in significant loss of canopy cover, which stresses the trees and makes them more susceptible to pathogens and wood-boring insects.

Management and control strategies for the Kentish glory focus on preventative and soft-chemical approaches:

• Regular forest health surveys to identify egg clusters and young larval populations.
• Encouraging natural predators such as birds and parasitic wasps that keep the population in check.
• Targeted application of biological insecticides, such as Bacillus thuringiensis, which is effective against caterpillars while being safe for non-target species.
• Limited use of conventional contact insecticides in high-value ornamental areas if threshold levels of defoliation are exceeded.