Sugarcane is a long-duration and high-value crop grown widely across India. Because it stays in the field for 10–12 months, weeds become a major challenge for farmers. Weeds compete with sugarcane for water, nutrients, sunlight, and space, especially during the early growth period. If not controlled on time, weeds can cause heavy yield loss and increase production costs. Effective weed management ensures healthy cane growth, more tillering, and higher sugar recovery. Here is an easy-to-understand guide for managing weeds in sugarcane fields.
1. Importance of early weed control
The first 90–120 days after planting are critical for sugarcane.
During this period, sugarcane grows slowly, while weeds grow fast and dominate the field.
Timely weed control at this stage ensures strong root development and good tillering.
2. Land preparation before planting
Good land preparation greatly reduces weed infestation.
Deep ploughing exposes weed seeds and roots to sunlight, which kills many of them.
Harrowing and leveling help remove leftover weeds.
Creating a fine seedbed makes it easier to manage weeds later.
3. Use clean seed material and proper spacing
Planting clean, disease-free setts reduces weed problems.
Proper row spacing (generally 80–120 cm) allows easy inter-row cultivation and good sunlight penetration, helping cane suppress weeds naturally.
4. Manual weeding and hoeing
Manual weeding is very effective in the early stages.
The first weeding should be done 25–30 days after planting.
A second weeding at 45–60 days helps keep the field clean.
Hoeing and earthing-up (earthing soil around the plant base) improve cane stability and suppress weeds.
Inter-row cultivation with implements saves labour and loosens the soil for better root growth.
5. Mulching
Mulching is one of the best natural methods for weed control.
Apply dry leaves, trash, sugarcane tops, or organic residues between rows.
Trash mulching suppresses weed germination, conserves moisture, and improves soil health.
It is especially useful in ratoon (second-year) sugarcane, where weeds emerge faster.
6. Herbicide application
Herbicides are widely used in sugarcane due to long crop duration.
a) Pre-emergence herbicides
Applied within 2–3 days after planting, before weeds germinate.
They create a protective layer on the soil and stop early weed growth.
b) Post-emergence herbicides
Applied 30–45 days after planting, when weeds are small and actively growing.
Always follow recommended dosage and spray at the right moisture level.
Rotate herbicides to prevent weed resistance.
7. Irrigation and fertilizer management
Over-irrigation encourages weed germination.
Apply irrigation according to crop requirement.
Also, place fertilizers near the sugarcane rows instead of broadcasting them across the field, reducing nutrient availability for weeds.
8. Ratoon crop weed management
Ratoon fields often have heavier weed growth.
Clean the field immediately after harvesting.
Apply pre-emergence herbicide early.
Use trash mulching generously.
These practices help keep ratoon crops healthy and productive.
9. Keep field borders clean
Weeds on bunds, channels, and field edges spread seeds into the crop.
Regular cleaning of borders prevents re-infestation.
Conclusion
Weed management in sugarcane requires a combination of timely manual weeding, proper herbicide use, mulching, and good field hygiene. The early growth stage of sugarcane is the most critical for weed control. By following these simple and practical methods, farmers can reduce weed pressure, promote strong crop growth, and achieve higher yields with better sugar content.
