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Stigmella prunetorum

Scarce sloe pigmy

Description

Stigmella prunetorum is a small leaf-mining moth in the Nepticulidae family, with a wingspan of 4–5 mm. It is found across Europe, except for Ireland, the Iberian Peninsula, and the Mediterranean islands. This species has two generations per year, with adults flying in May and then again in August to September. The larvae primarily target Prunus species, such as Prunus spinosa (blackthorn), Prunus domestica (plum), and other related species, creating distinctive spiral-like mines on their leaves. These mines can reduce the aesthetic appearance of the foliage, creating brown areas that often appear as blotchy damage. While the presence of this species on leaves does not significantly threaten the vitality of the host plant, it can detract from its appearance, especially in ornamental plantings, parks, and gardens.

Symptom

The mines on the leaves are initially coiled into a spiral, and filled with frass. The spiral appearance at the beginning of the mine is very characteristic of this species. The spiral then ends with a straight section long around of 1–2 cm, with space for pupation at the end. Multiple mines may occur on a single leaf, giving it a blotchy, unsightly appearance.

Tree Species: Cherry, Plum, Blackthorn

Part of a plant- attacked: Leaf / Needle

Pest significance: Less harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes