Ash bark moth

The Ash bark moth (Euzophera pinguis) is a moth species belonging to the order Lepidoptera and the family Pyralidae. It is a specialized pest known to infest ash trees, causing significant damage to the bark and underlying cambium layer of the trunk and branches.

This moth primarily targets ash species (Fraxinus). The larvae burrow into the bark, feeding on the inner bark tissues. This activity disrupts the tree's vascular system, leading to weakened health and potential long-term damage to the wood quality and structural integrity.

The life cycle consists of egg, larva, pupa, and adult stages. Adult moths are typically active during the summer. Eggs are laid in bark crevices or near physical wounds. The larvae overwinter under the bark in galleries they have excavated, emerging or pupating in the following season.

The damage is characterized by winding galleries under the bark, which can cause necrosis and deep splitting of the bark surface. Heavily infested trees show reduced vigor, canopy dieback, and in severe cases, the entire tree may be girdled and die due to the disruption of nutrient transport.

Effective management and protection strategies for the Ash bark moth include:

• Regular inspection and sanitary pruning of infested branches.
• Protecting tree trunks from mechanical injuries to minimize egg-laying sites.
• Application of systemic insecticides during the peak larval emergence period.
• Encouraging natural predators and maintaining tree health through proper irrigation and fertilization.