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:
Tomato
The tomato is native to western South America. Wild versions were small, like cherry tomatoes, and most likely yellow rather than red. The Spanish first introduced tomatoes to Europe, where they became used in Spanish and Italian food. The French and northern Europeans erroneously thought them to be poisonous because they are a member of the deadly nightshade family. This was exacerbated by the interaction of the tomato's acidic juice with pewter plates. The leaves and immature fruit contains tomatine, which in large quantities would be toxic. However, the ripe fruit contains no tomatine.