India’s second most valuable agricultural crop and the basis of the sugar, ethanol, and by-product industries — grown across 5 million hectares from UP’s Tarai to the peninsula’s river valleys.
5 Major Threats and Their Control
For educational purposes only. Recommended crop varieties are location-specific. Always verify chemical and variety recommendations with your local KVK or State Agriculture Department.
1. Red Rot
(Colletotrichum falcatum)
The Threat:
- Red rot is the most destructive disease of sugarcane in India, responsible for the near-collapse of cane cultivation in parts of UP in the 1990s before disease-free sett programmes were established.
- The pathogen enters through infected setts or damaged internodes after waterlogging or insect injury.
- Infected stalks develop distinctive red discolouration and a characteristic sour alcoholic fermentation smell.
- In ratoon crops, a single season of red rot can spread through the entire root zone and destroy up to 50% of the crop.
The Solution:
- Use certified, disease-free setts from registered seed nurseries — the foundation of red rot management.
- Treat setts in hot water at exactly 50°C for 2 hours before planting to kill the internally-carried fungus without damaging sett viability.
- Grow resistant varieties recommended by ICAR-SBI, Coimbatore — CoJ-64 and CoLk-8001 are widely recommended.
- Rogue and burn infected stools immediately upon detection; never ratoon a red rot-affected field.
2. Top Shoot Borer
(Scirpophaga nivella)
The Threat:
- The top shoot borer attacks sugarcane in two distinct phases:
- First-generation larvae: Attack the young shoot between emergence and the first tiller formation stage, producing the characteristic “dead heart” — the central leaf whorl yellows and dies while surrounding leaves remain green.
- Second-generation larvae (August–September): Attack the growing apical bud of established cane, again producing dead heart in plants that have already invested 3–4 months of growth.
- Borer activity significantly reduces the number of productive stalks in the final harvest.
The Solution:
- Apply Carbofuran 3G granules (Systemic Insecticide — Carbamate, IRAC Group 1A) @ 5 kg/ha into the leaf whorl at first deadheart appearance; the granules release the active ingredient over 4–6 weeks, covering the larval window.
- Install pheromone traps (Semiochemical) @ 5 per hectare to monitor adult moth emergence and time the application to the peak egg-laying window, maximising the efficiency of the chemical intervention.
3. Pyrilla / Sugarcane Leafhopper
(Pyrilla perpusilla)
The Threat:
- Pyrilla is a gregarious, sap-sucking leafhopper that colonises the underside of leaves in large, coordinated populations.
- Feeding produces copious honeydew that falls onto lower leaves, promoting rapid growth of sooty mould colonies.
- The black fungal film blocks photosynthesis, and combined with sap loss, reduces sucrose content and cane weight.
- In severe outbreaks, the entire lower canopy of a sugarcane field can be covered in honeydew and black mould.
The Solution:
- Avoid excessive urea application, as it encourages succulent growth, which attracts Pyrilla.
- Dip setts in Chlorpyriphos (Organophosphate insecticide, IRAC Group -1B) 20 EC solution (2ml/liter) before planting
- Apply Carbofuran 3G granules (Systemic Insecticide — Carbamate, IRAC Group 1A) @ 5 kg/ha into the leaf whorl at first deadheart appearance; the granules release the active ingredient over 4–6 weeks, covering the larval window.
- Install pheromone traps (Semiochemical) @ 5 per hectare to monitor adult moth emergence and time the application to the peak egg-laying window, maximising the efficiency of the chemical intervention.
4. Smut Disease
(Sporisorium scitamineum)
The Threat:
- Sugarcane smut converts the growing apical bud of an infected cane into a long, curved black whip of fungal spores at the grand growth stage.
- The infected cane produces no harvestable material, only sterile, spore-bearing structures.
- Spores are released by wind and rain, infecting healthy setts and buds of neighbouring plants.
- Spread through infected setts is the primary introduction route of the disease into a new field.
The Solution:
- Treat setts by soaking in Carbendazim 50 WP solution (Systemic Fungicide — Benzimidazole, FRAC Group 1) @ 1 g/litre for 10 minutes before planting to eliminate externally-carried spore inoculum.
- Grow smut-resistant varieties recommended by ICAR-SBI.
- Remove and burn black-whip plants immediately upon detection, as the spore mass on the whip tip releases millions of spores at the slightest disturbance.
5. Waterlogging / Flooding
The Threat:
- Prolonged waterlogging during the formative tillering stage (first 0–4 months) creates root anaerobia, severely limiting tiller production.
- Reduced tiller production directly lowers final stalk population, which determines cane yield.
- Every tiller lost to early waterlogging is a permanent reduction in final cane count.
The Solution:
- Adopt trench or furrow planting — sow setts in trenches or furrows to raise the developing ratoon and tillering zone above waterlogged soil.
- Maintain open drainage channels on all four sides of the field throughout the growing season.
- In fields with perennial waterlogging, install sub-surface drainage (tile drains) at 60–90 cm depth.
Ph.D. in Agricultural Engineering.