Externally, the first obvious signs of disease in most varieties are wilting and a light yellow colouring of the lower leaves, most prominent around the margins. They eventually turn a bright yellow colour with dead leaf margins.
Splitting of pseudostem base is a characteristic symptom.
When a cross-section is cut, the discolouration appears in a circular pattern around the centre of the rhizome where the infection concentrates due to the arrangement of the vessels. As symptoms progress into the pseudo-stem, continuous lines of discolouration are evident when the plant is cut longitudinally
The disease is soil borne and the fungus enters the roots through the fine laterals.
The pathogen is easily spread by infected rhizomes or suckers, farm implements or vehicles, irrigation water
yellowing of the lower leaves
Drying of leaves
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