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:
Phytophthora capsici
"P. capsici" causes pre- and post-emergence damping off of seedlings. It also causes vine blight contributing to developing water soaked lesions on the vine which start off as dark olive-colored and soon turn dark brown. This leads to rapid collapse and death of foliage above the lesions. Similar lesions may appear on the leaves and petioles of the pumpkin. Fruit rot is also a very common symptom.