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 of cotton
Bacterial blight of cotton is a disease affecting the cotton plant resulting from infection by "Xanthomonas axonopodis pathovar malvacearum" (Xcm) a Gram negative, motile rod-shaped, non spore-forming bacterium with a single polar flagellum.