Poplar clearwing

The poplar clearwing (Aegeria ommatiaeformis) is an insect belonging to the order Lepidoptera and the family Sesiidae. These moths are well-known for their mimicry, as their wings and body structure closely resemble those of wasps or hornets. This species is classified as a significant wood-boring pest that affects forest stands, shelterbelts, and urban ornamental trees.

The primary hosts for this clearwing moth are species within the Populus genus, though they are occasionally found on willows. The larvae are specialized feeders that thrive within the woody tissues of the host plant. They demonstrate a preference for trees that have existing wounds or are undergoing physiological stress, although they can adapt to healthy specimens in dense infestations.

The biological cycle of the poplar clearwing involves several developmental stages: egg, larva, pupa, and adult. Mating and oviposition occur during the summer months. After hatching, the young larvae tunnel into the bark and cambium layer. The larval stage is often prolonged, lasting one or two years depending on local environmental temperatures and the host's nutritional quality, before they pupate within their constructed galleries.

The damage caused by Aegeria ommatiaeformis is internal and often remains unnoticed until severe symptoms appear. Larval boring destroys the conductive tissues, causing branch dieback, crown thinning, and extensive cracking of the bark. Accumulation of frass (wood dust mixed with excrement) at the base of the tree or near exit holes is a primary diagnostic sign of a heavy infestation.

Effective management strategies rely on integrated pest management (IPM) practices:

• Regular forest sanitation, including the removal and destruction of heavily infested trees.
• Implementation of pheromone traps to monitor adult flight periods and reduce population pressure.
• Trunk injections with specialized systemic insecticides for high-value ornamental trees.
• Enhancing tree vitality through proper irrigation and soil management to prevent larval success.