Boxwoods Leaf Symptoms

Question

Hi, I’ve got mature Boxwoods that are showing some strange leaf symptoms. I did spray Horticultural Oil on them a few days before at night, not sure if that’s a factor. Meanwhile, I treated them with Spinosad on suspicion of insect damage. Please assist Thanks! Sam

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Answer 1

Your photos look like the photo of boxwood mites in this publication. Leaves have a speckled or scratchy appearance. Control is by blasts of water on the foliage or miticides or horticultural oil. Sounds like your treatments should work. Continue to watch for more activity.

http://ccesuffolk.org/resources/photographic-guide-of-boxwood-pests-diseases-on-long-island

https://www.gardeningknowhow.com/ornamental/shrubs/boxwood/boxwood-bud-mites.htm