Boxwood Blight
Boxwood blight caused by the fungus, Cylindricladium pseduonaviculatum, can affect all species in the genus Buxus, although some cultivars are more susceptible than others. Foliar lesions will appear first, lesions on stems appear soon after. When the infection becomes severe, the plant will drop its leaves causing stress and eventual death.
Needle, Tip, Twig Blights
Needle, tip, or twig blights occur on arborvitae, cypress and juniper species turning tips of twigs and ends of needles brown or grey. Black, pimple-like fungal fruiting structures may develop on needle surfaces. These blights can be caused by fungi in the genera Phompsis, Diplodia or Coryneum.