Leyla cypress looks dead in middle
There are a couple of plant diseases that affect leyland cypress, caused by opportunistic fungal pathogens. Keep trees in good health and vigor, and try to avoid environmental stresses by planting properly and in good sites (not windy, good drainage), to avoid tree diseases.
The abandoned house next door is being maintained by a landscaping service for the bank. It appears they sprayed to kill vines growing over their entire length of fence front and side. The trees are green on bottom and top just not along the fence edge which is in the middle of trees. Trees a bit further down the line are ok as they couldn’t be accessed from their yardages.