Blight
Blight is a rapid and complete chlorosis, browning, then death of plant tissues such as leaves, branches, twigs, or floral organs. Accordingly, many diseases that primarily exhibit this symptom are called blights. Several notable examples are:
Bacterial blight (barley)
Bacterial blight is a disease of barley caused by the bacterial pathogen "Xanthomonas campestris" pv. "translucens" (syn. "X. translucens"). It has been known as a disease since the late 19th century. It has a worldwide distribution.