Mites that occur in the soil seem to serve as a vector and should be controlled with soil treatment if this disease is a problem. Do not plant infected corms. Rotate areas where gladiolus are planted. Leaves, stems, flowers and corms are infected. Leaf spots are variable in size and shape.
Infected flowers decline rapidly and have grayish fungal growth on the surface.
The tissues become moist and slimy. Under severe conditions the entire top may be killed. Infected corms have irregularly shaped sclerotia attached to them. Affected corms should be discarded. Use suggested fungicides for controlling the disease on above-ground plant parts.