Box tree moths - Ask Extension
Do u need to treat boxwood for box tree moths prior to infestation
Knowledgebase
Box tree moths #869903
Asked May 24, 2024, 10:22 AM EDT
Do u need to treat boxwood for box tree moths prior to infestation
Oakland County Michigan
Expert Response
If it is a recently planted boxwood, I would encourage it. Oakland County is a hotspot for box tree moth right now. If it's an older plant, you can scout it regularly to see if you notice symptoms of damage before treating. The caterpillars are active now, and they can be hard to spot since they camouflage with the shrub.
Insecticides that will kill box tree moth include BT kurstaki (needs to be reapplied every 2 weeks) and pyrethroids (see this list for active ingredients) with a treatment now and one in mid-July when 2nd generation . The link for pyrethroids includes products that are only available to certified pesticide applicators, but you'll find pesticides in the garden center that have those active ingredients. Be sure to read the label before purchasing and applying.
Insecticides that will kill box tree moth include BT kurstaki (needs to be reapplied every 2 weeks) and pyrethroids (see this list for active ingredients) with a treatment now and one in mid-July when 2nd generation . The link for pyrethroids includes products that are only available to certified pesticide applicators, but you'll find pesticides in the garden center that have those active ingredients. Be sure to read the label before purchasing and applying.
