Ash Midrib Gall Midge (Contarinia canadensis) is a common but little known insect of true ash trees (genus Fraxinus) in Grande Prairie.


Eggs are laid along the mid-vein of ash leaflets in spring and as the larvae feed a gall is formed along this vein, disfiguring the foliage.


Damage from this insect is largely cosmetic so no control is necessary.

Blighted Leaves