Hello Janice,

You have boxwood leaf miner. They are the larval stage of a midge fly. They tunnel and eat tissue between the two outer layers of the leaf. I have included a link to a BYGL (Buckeye Yard and Garden onLIne) that has the information on control. It recommends two systemic chemicals and application after bloom to avoid killing pollinators. You do need to control this pest, but it is early in the infestation. You should be able to save your boxwood.

Hi Jan,

Thank you for the picture.  Although the leaves are a bit damaged, it appears to be a black hawthorn.  The leaf damage is representative of anthracnose, which is more typical on Indian hawthorn, not to be expected on a black hawthorn, a different species.  Your problem looks like hawthorn leaf spot in advanced stages.  Early on, there would have been small reddish-purple spots which would have darkened and grown to the blotches in your picture.

In any event, both are fungal diseases with the same treatment.  To reduce future problems, exercise good sanitation practices by collecting and disposing fallen leaves elsewhere (not by composting), promote air circulation and light penetration, and water early in the day, avoiding the foliage.  For a more complete information, please review the management strategies on the linked UMass Extension factsheet:  https://ag.umass.edu/landscape/fact-sheets/hawthorn-leaf-spot.  If you ever choose fungicides, remember that fungicides will not kill the infection, they deter initial infections and their spread.  They are best applied early, before there is an infection.  Also, please follow all pesticide label instructions, including what you are targeting on your trees and the application instructions.

Thank you for your question.  In the future, please submit different, unrelated questions separately to avoid indexing confusion.