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Red rot of sugarcane
Red rot of sugarcane is caused by the fungus Colletotrichum falcatum. It was first reported in 1893 in Java and causes significant losses in sugarcane crops. Symptoms include yellowing of leaves, shriveled canes that are light in weight and easily broken with reddening of the pith. The pathogen survives in plant setts, infected plant debris, and soil. Management strategies include using disease-free setts, hot water or hot air treatment of setts, removing infected plant material, crop rotation, and growing resistant varieties.
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Red rot of sugarcane
- 1. RED ROT OFSUGARCANE DR. RAJBIR SINGH Assistant Professor Department of Plant Pathology Gochar Mahavidyalaya, Rampur Maniharan, Saharanpur (UP), India Affiliated to Ch. Charan Singh University, Meerut (UP), India Email: rajbir25805@yahoo.com, rajbirsingh2810@gmail.com Cell No. 91-9456613374
- 2. Red Rot ofSugarcane Reported: • 1893 – by Went from Java • 1901 - by Barber from Godavari in India • Butler gave name – red rot • All sugarcane growing areas • Epidemic in 1939 – 40 in east UP & Bihar
- 3. Symptoms: • Appear afterrainy season when pl. growth stop & sugar formation start • Third leaf from top start - yellowing • Later infected cane – shriveled • Rind shrink • Cane light in weight & easily broken • Reddening of pith with clear area (white) running
- 4. • Pith cavityfilled with grayish mycelium • Juce – bed odour & not set well on boiling due to conversion of sucrose into glucose • Low quality sugar- conversion into alcohal • Minute dot like structure (acervuli) near the diseased node
- 10. Pathogen – Colletotrichumfalcatum (I. P) Glomerella tucumanensis (P. S) • Muddy red color – absorbed by pith – so called red rot • Pathogen survive in setts / seed canes , infected stubbles and soil as Chlamydospore • Disease is soil & seed borne
- 11. Systemic Position Kingdom –Mycota/ Fungi Division – Eumycota Sub division – Deuteromycotina Class – Coeleomycetes Order – Melanconiales Family – Melanconaceae Genus – Colletotrichum Species - falcatum
- 12. Disease Management • Diseasefree setts • Setts treatment – Carbendazim @ 2.5 gm/lit. of water for 30 minutes • Hot water treatment – 52° C for 8 hrs • 54° C for 2 hrs • Hot air treatment - 54° C for 6 hrs • Removal of infected stools • Crop rotation 2-3 yrs • Dis. Res. Varaties.- Cos -767, Co- 840, Co- 1148, Co- 1158, Bo-32
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