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Phytomyza agromyzina

Leaf-mining fly Phytomyza agromyzina

Description

Phytomyza agromyzina is a leaf-mining fly that affects Cornus spp. (dogwoods). The larvae create serpentine mines on the upper surface of the leaves. As they feed, the frass partly liquifies, forming a broad dark-brown central band within the mine. Pupation typically occurs outside the mine, though the puparium is sometimes found within it. Mines are observed from June to October. Although the mining causes cosmetic damage to the foliage, it generally does not significantly impact the health of established plants. Control measures, such as removing affected leaves or applying insecticides, are typically only needed in severe infestations. Regular monitoring is advised to prevent potential outbreaks.

Symptom

The larvae create serpentine mines on the upper surface of the leaves.

Tree Species: Dogwoods

Part of a plant- attacked: Leaf / Needle

Pest significance: Less harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes