Name of disease: Red rot
Causal agent : Glomerella tucumanensis
The spindle leaves (3rd14th)) display drying. At a later stage, stalks become discoloured and hollow. Acervuli (black fruiting bodies) develop on rind and nodes. After splitting open the diseased stalk, a sour smell emanates. The internal tissues are reddened with intermingled
transverse white spots. In advanced stage of the disease, the colour becomes earthy brown with pith cavity in the centre showing white cottony hyphae and sometimes fruiting bodies of fungus (acervuli). In rainy season, the disease spreads so fast that whole crop dries and not a single millable cane is obtai
Resistant or moderately resistant varieties should be used. Any sett showing reddening at the cut ends or at the nodal region should be discarded. Healthy seed should be planted. Such seed must be produced from crop raised from heat treatment of seed canes in moist hot air at 54°C for 2.5 hour at 99% humidity. As soon as disease' is noticed, the affected clump along with root system should be uprooted and burnt. Bunding of affected field should be done to avoid movement of rain or floodwater. Ratooning of diseased crop should be avoided. Diseased crop should be harvested as early as possible. Crop rotation should be followed in affected fields.
Submitted by gpsingh on Fri, 09/01/2009 - 13:04