The first signs of corky root rot are elliptical light-brown areas up to 5 mm long, on the thin roots. This stage is often referred to as brown root rot. On the larger roots, the discoloration is darker brown, and the roots become somewhat swollen, dry and corky, with splits all over the outer sheath . The sheath, or cortex, is readily pulled off the central core, or stele. Massive root failure causes general unthriftiness, severe wilting in hot weather, and eventually, death.
Fungi enters through the roots of the plants And spread all over the plants . The disease is most severe when transplants are put into soil that is too cold.
