Brindled beauty

Systematic position. The Brindled beauty (Lycia hirtaria) is a moth species belonging to the order Lepidoptera and the family Geometridae. As a polyphagous insect, it is recognized as a significant pest in both forestry and horticulture due to its widespread distribution and diverse diet.

Affected crops. This pest targets a wide variety of deciduous trees and shrubs. It is particularly problematic in orchards, affecting apple, pear, plum, cherry, and apricot trees. Beyond fruit-bearing species, it thrives on common woodland trees like birch, lime, oak, and willow, which act as reservoirs for the population to migrate into neighboring gardens.

Biology and life cycle. The species is univoltine, meaning it has one generation per year. Adults emerge in early spring, often in April. Females lay their eggs in small clusters hidden within bark crevices. Larvae emerge shortly after and feed on foliage throughout the spring and early summer before descending into the soil to pupate. The pupa remains in the ground throughout the winter months.

Nature of damage and economic impact. The larval stage is the primary source of damage. Young larvae graze on leaves, while older caterpillars are capable of rapid defoliation. A heavy infestation can leave trees completely stripped of foliage, leading to severe physiological stress, poor fruit set, and reduced vigor of the tree, which can significantly decrease overall fruit yield.

Protection measures. Effective control involves both mechanical and chemical interventions. Cultivating the soil beneath the canopy in late summer or autumn can destroy pupae. During the growing season, pheromone traps can be used for monitoring, while targeted application of insecticides or microbial agents (such as Bacillus thuringiensis) is recommended when larvae are observed feeding on the buds or young leaves.

• Applying sticky bands to trunks to prevent larval migration.
• Encouraging natural predators such as birds and parasitoid wasps.
• Regular orchard scouting during the spring season to assess infestation levels.