Lime hawk-moth

The Lime hawk-moth (Mimas tiliae) is a large, distinctive moth belonging to the Sphingidae family within the order Lepidoptera. It is a common insect across Europe and parts of Western Asia, frequently observed in urban woodlands, parks, and large private gardens where host trees are present.

The primary host plants for the larvae (caterpillars) are linden trees (Tilia), though they are occasionally found on birch, alder, elm, and willow. Adult moths do not feed, as their mouthparts are significantly reduced, meaning the economic impact is exclusively linked to the larval feeding stage.

The life cycle is univoltine, meaning there is one generation per year. Adult moths emerge between May and June. Females lay eggs singly or in small groups on the undersides of leaves. Upon hatching, the larvae begin to feed, reaching their full size by late summer before descending to the soil to pupate.

The damage caused is primarily defoliation. Young larvae create small holes in the foliage, while mature caterpillars consume the entire leaf blade, often leaving only the thickest veins. Heavy infestations can lead to significant canopy loss, weakening the tree's health and vigor during the growing season.

Management strategies focus on integrated pest control. In ornamental settings, hand-picking larvae can be effective for small trees. For larger populations, applying biological insecticides or horticultural oils during the early larval stages helps mitigate damage without harming the environment excessively.

• Soil cultivation around the base of trees in autumn to destroy pupae.
• Promoting natural predators like insectivorous birds and parasitic wasps.
• Monitoring using light traps to track peak adult emergence periods.