Ascold sphinx moth

The Ascold sphinx moth (Deilephila ascoldensis) is a member of the Sphingidae family within the order Lepidoptera. While it is a specific species often associated with certain regional floras in East Asia, it can occasionally manifest as a pest that impacts viticulture and ornamental plant health in its native range.

The primary host plants for the larvae of this moth belong to the Vitaceae family. These caterpillars specialize in feeding on the foliage of wild and cultivated grapevines. Their presence can be identified by the rapid disappearance of leaf tissue on the host plants throughout the summer months.

The life cycle follows the standard pattern of complete metamorphosis. The overwintering stage occurs as a pupa, typically nestled within the top layer of soil or garden debris. Following emergence in the warmer months, the adults mate and deposit eggs, usually in clusters on the undersides of leaves.

Damage is characterized by the consumption of leaf blades, which can vary from minor notches in young leaves to complete defoliation of shoots in cases of severe infestation. This feeding behavior restricts the plant's ability to photosynthesize, ultimately hindering its growth and potential fruit production.

• Cultural practice: Deep cultivation of the soil around the vines in late autumn to expose pupae to frost and predators.
• Manual control: Hand-picking caterpillars during morning or evening hours when they are most visible.
• Biological control: Application of bio-insecticides containing Bacillus thuringiensis.
• Chemical control: Targeted application of authorized systemic insecticides if infestation levels exceed economic thresholds.