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Description

Ash Leaf Cone Roller (Caloptilia fraxinella) is the larval stage of a small grey moth which lays its eggs on green and black ash leaves in the spring.

Ash Leaf Cone Roller

These rolled leaves will continue making food for the tree,
making the ash leaf cone roller an aesthetic insect
problem that poses no risk to the health of the tree.

Plants Affected

Symptoms

  • The larvae that hatch spend several weeks mining tissue between the upper and lower leaf surfaces.
  • In June, they move to neighbouring leaflets where they use silken threads to roll and secure a leaflet in place to spin a cocoon.  

Controls

No control is necessary, as this insect does not pose a risk to the health of the tree.

 

Last updated: 9/13/2013 10:32:30 AM