Red Striped Disease:
Symptoms:
- The disease first makes its appearance on the basal part of the young leaves. The stripes appear as water soaked, long, narrow chlorotic streaks and become reddish brown in a few days. The core is discolored to reddish brown and shriveled and forms a cavity in the center. In badly affected fields, a foul and nauseating smell appears.
Management:
Cultural Control:
Rogue out and burn affected plants. Fresh sowing is done with resistance varieties in well drained soils. Apply nitrogen based on actual crop requirements. Ensure optimum seeding rate and wider plant spacing also appear to reduce the disease.
Chemical Control:
Spraying with Carbendazim 50% WP @ 1.0g per liter of water immediately after noticing the disease in the field.
Wilt:
Symptoms:
- The first symptom of the disease is visible in the canes of 4-5 month age. The canes may wither in groups. The affected plants are stunted with yellowing and withering of crown leaves. The midribs of all leaves in a crown generally turn yellow, while the leaf lamina may remain green.
Management:
Cultural Control:
Select the seed material from the disease free plots. Burn the trash and stubbles in the field. Grow coriander or mustard as a companion crop in the early stages of crop. Avoid alkaline soils for growing the crop.
Physical Control:
Treat the sets in hot water at 500C for 2 hours followed by dipping in Carbendazim 75%WP @ 2g/lit. of water for 1kg of seed for 15 minutes. Dip the sets in @40 ppm Boron or Manganese for 10 minutes.
Biological Control:
Multiply Trichoderma viride @1kg/acre mix with 25 kg of Farm yard manure for 15 days and then apply to the soil.
Chemical Control:
Treatment of setts with fungi-toxicants before planting Bavistin 50% WP. Apply Carbendazim 50% WP @ 2gm/lit of water.
Smut:
Symptoms:
- The affected plants are stunted and the central shoot is converted into a long whip-like, dusty black structure. The length of the whip varies from a few inches to several feet. In early stages, this structure is covered by a thin, white papery membrane. The whip may be straight or slightly curved.
Management:
Cultural Control:
Grow resistant varieties like Co 6806 and Co 62175. Grow red gram as a companion crop between 2 rows of sugarcane. Follow crop rotation with green manure crops or dry fallowing.
Mechanical Control:
Remove the whip with thick cloth without allowing the spore to shed and destroy.
Physical Control:
Treat the sets in hot water at 52oC for 2 hours.
Chemical Control:
Seed treatment with Thiram 75% WP or Captan 75%WP @3g/kg seed. Sett’s treatment with fungicides vizTriadimefon 25% WP @ 200g dissolve in 250-300 liter of water or Carbendazim 50% WP @ 2.5 g/lit. of water for 10 minutes.
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