Shear Boxwoods and Eastern White Cedars to Control Miners
OMAFRA has issued a reminder that now is the time to give both these woody plants a light shearing to reduce populations of leafminers currently in the larval stage in which they feed on the inside of leaves and scales.
You may have noticed the damage they cause — yellow spots on boxwood foliage and dead brown scales on cedars.
Annual summer sheering of these evergreen hosts can, over time, reduce infestations of leafmining pests, and also create a more full look by supporting increased lateral bud growth.
Don’t worry about cleaning up all the clippings. When they dry up, they are unable to support the miners.