Dasineura rosae

Rose leaf gall midge

Description

Dasineura rosae, commonly known as the rose leaf gall midge, is a monophagous insect from the family Cecidomyiidae. It specifically infests various rose species (Rosa spp.), such as Rosa canina, R. rubiginosa, R. gallica, and others. This species is widely distributed in Europe, particularly in areas where roses are cultivated or grow naturally. The insect completes two or more generations annually, with larvae pupating in the soil.

The larvae induce characteristic galls by feeding on the leaf tissue. These galls form as folded, thickened leaflets, often tinged with red, creating a pod-like structure where numerous orange larvae develop. While infestations rarely affect the overall health of robust plants, heavy infestations can lead to leaf deformation, reduced photosynthetic efficiency, and diminished ornamental value of roses, particularly in ornamental gardens and nurseries.

Symptom

Leaves fold upwards along the main vein, becoming thickened and reddish. Inside the pod-like galls, orange larvae are visible. Severely affected leaves may deform or drop prematurely.

Tree Species: Rose

Part of a plant- attacked: Leaf / Needle

Pest significance: Less harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes