What is red rot?
Red rot is one of the major constraints in the profitable cultivation of sugarcane in many states of India. This disease drastically retards the yield and considerably deteriorates the juice quantity and quality thus hitting both the cane growers and millers. Many good varieties have gone out of cultivation due to red rot.
Causal organism: Colletotrichum falcatum
Brown or reddish brown stripes appear externally at nodal region. On splitting, the internal tissue becomes red with white transverse bands. Tissues emit alcoholic sour smell. Tiny acervuli develop on outer surface of sprinkled upper internodes. Cottony gray fungal mass develops in the pith region of the internodes and sporulates abundantly
Avoid planting of highly susceptible varieties. Planting material should be collected from the seed nursery.
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