Leaf miner

Leaf miner is a term used to describe the larvae of many different species of insect which live in and eat the leaf tissue of plants. The vast majority of leaf-mining insects are moths (Lepidoptera), sawflies (Symphyta) and flies (Diptera), though some beetles and wasps also exhibit this behavior.

Identifying Features
From May onwards leaves may show the damage caused when the white grubs burrow inside, this later turns into blisters. Younger plants are more at risk.

Treatment
No treatment available.

Prevention
Remove damaged leaves.