Stems have water-soaked spots, turn black and rot, causing the plants to collapse. Crowns may be affected too. Remove and destroy infested plant parts immediately. Space plants far apart thus improving air circulation and control insects, such as Aphids that will spread the disease. Use only sterilized soil.
Leaves turn yellow.
White moth-like flies fly out of the plants when disturbed. Cottony material is found on the leaves and stems. Woolly, white insects with waxy coverings suck sap from leaves and stems. Leaves may be shiny and dry. Use Malathion .