Q.Bumps on American Boxwood Stems
I am in Richmond, VA, and I can’t seem to figure out what is wrong with my American Boxwood shrubs. Stems are covered with little bumps throughout, though no bumps on the leaves. Stems also blackish towards the base. Some leaves show slight discoloration. The shrub seems to be dying from the inside out (meaning from the center of the shrub outwards). Is this a fungus, blight, or hard/soft scale, or something different entirely? Wish I knew. Hoping someone may be able to help identify what condition this is. Thanks
This sounds very much like Boxwood Blight.
Here are some links with more information and some images to help you correctly diagnose the disease effecting your shrubs.
https://www.gardeningknowhow.com/ornamental/shrubs/boxwood/yellow-or-brown-boxwoods.htm
http://www.clemson.edu/extension/hgic/pests/plant_pests/shrubs/hgic2052.html
https://www.gardeningknowhow.com/ornamental/shrubs/boxwood/boxwood-blight-treatment.htm
