Leaf Miner

Tree affected by leaf miners

What is a leaf miner?

A leaf miner is a generic name for insect larvae that feed between the two epidermal layers of a leaf. Birch leaf miner (sawfly) and the ash leaf coneroller (moth) are common in Saskatoon, but other tree species such as poplar, lilac, oak, and hawthorn are also susceptible to different leaf miners.

What kind of damage is caused by leaf miners?

Damage is caused by larvae feeding inside the leaves. Feeding creates a meandering tunnel under the leaf surface. Typically, the damage does not affect the health of the tree.

How do I control leaf miners?

If only a few leaves are affected, leaves can be removed. Generally, no treatments are necessary for leaf miners.