Allantus cinctus

Curled rose sawfly

Description

Allantus cinctus, known as the curled rose sawfly, is a sawfly species widespread in Europe, particularly in southern and central regions. It has also been introduced to North America. The larvae feed on plants from the Rosaceae family, including Rosa, Rubus, and Fragaria. Females lay eggs in small incisions on the underside of leaves, and larvae skeletonize leaf tissue, sometimes consuming entire leaves except for the main veins.

Severe infestations reduce plant vitality and significantly affect ornamental plants’ aesthetic value. The larvae are green with white abdominal spots and a yellow head marked with a dark brown stripe. In favorable conditions, two or even three generations per year can develop. Adults emerge in spring and are about 10 mm long, with nearly transparent wings and a black, glossy abdomen featuring a pale band in the middle.

Symptom

Larvae skeletonize leaves, leaving only the main veins intact. Feeding damage results in irregular holes and leaf curling. Pupation inside pruned twigs can cause stem dieback and facilitate fungal infections. In cases of heavy infestation, leaves may be entirely consumed.

Tree Species: Blackberry, Rose

Part of a plant- attacked: Leaf / Needle, Branch

Pest significance: Less harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes