This sample was brought in off of an Aspen tree. Leaf miners devour between the upper and lower surfaces of the leaves. Leaves are still able to perform photosynthesis despite being damaged. Leafminers are usually host specific. Management options are removing infested leaves and destroying them. Natural predators are the green lacewing and spiders.
Leafminer: WSU hortsense handout
Western Tentiform Leafminer: attacks primarily apple and crabapples, sweet and tart cherries. It can attack pear trees but has been uncommon in Washington.
Lilac Leafminer: WSU hortsense handout