Hemichroa australis

Sawfly Hemichroa australis

Description

The adult Hemichroa australis typically measures around 7 to 8 mm in length. This sawfly species displays a predominantly black body with an orange head and thorax, creating a distinct appearance. Adults fly in spring and lay eggs on host trees. Larvae are green with ochre brown head. During their larval stage, Hemichroa australis larvae feed on the leaves of Birch and Alder trees. Their feeding behavior evolves as they grow: young larvae create holes in the leaves, forming characteristic curved or angled lines in leaf blade, while larger larvae consume the leaf edges. These feeding patterns serve as key identifiers for this fascinating insect species. Larvae pupate in the soil, where they overwinter.

Symptom

Their feeding behavior evolves as they grow: young larvae create holes in the leaves, forming characteristic curved or angled lines in leaf blade, while larger larvae consume the leaf edges. These feeding patterns serve as key identifiers for this fascinating insect species.

Tree Species: Birch, Hazel

Part of a plant- attacked: Leaf / Needle

Pest significance: Less harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes