Sow a border crop the target pest prefers over your main crop, pulling it away from the field that actually matters — spray only the trap strip if needed, and the main crop mostly skips the spray entirely.
The quick decision panel — everything you need before reading a single paragraph further.
What actually changes on your farm once this is in place.
A spray, when needed, covers only the 5–10% border strip instead of the whole field.
The main crop mostly skips the spray entirely, since the pest concentrates on the trap crop it prefers.
A low-cost, low-tech first step into integrated pest management for any farmer.
Complements biological control, since trap crops also attract natural enemies that help control the pest.
Needs only the seed for a border strip, no machinery or ongoing input beyond that.
Works alongside IPM scouting as an early-warning strip — pest buildup shows there before it reaches the main crop.
The practice broken into the steps you will actually follow, in order.
Confirm which pest is the recurring problem, and which crop it prefers over your main crop.
Typically 2–4 rows around the field edge, or a strip within it, sown slightly ahead of the main crop so it is attractive when the pest arrives.
Scout the trap strip specifically — it doubles as an early-warning system for the whole field.
If pest numbers on the trap crop cross a damaging level, a targeted spray there protects the main crop by proxy.
Keep it healthy and attractive to the pest for as long as the main crop is at risk.
An honest read before you spend a rupee or an hour on it.
This technique against conventional practice, head to head, per acre.
Trap crop seed
Pesticide (whole field vs trap strip only)
Spray labour
Conventional total
₹8,200/ha
This technique, total
₹1,800/ha
A saving of roughly ₹6,400/ha in a season where the target pest genuinely concentrates on the trap crop, since spray is confined to the 5–10% border strip instead of the whole field.
What farmers already using this technique typically measure.
5–10% of the field
Area Sprayed
Mostly skips the pest and the spray
Main Crop Protection
₹5,000+/ha
Pesticide Cost Saved
Pest buildup visible before it reaches main crop
Early-Warning Value
Where this technique earns its keep the fastest.
Where this is already common field practice, not a pilot.
Commonly practised here
What goes wrong most often, and the fix, before it costs you a season.
Where this technique sits in the crop cycle, start to harvest.
Mark out the border or strip area for the trap crop alongside the main field preparation.
The trap crop goes in 1–2 weeks ahead of the main crop, so it is already attractive when the pest arrives.
This technique matters most here
This is the highest-value window — scout the trap strip closely as the main crop's vulnerable stage approaches.
Keep the trap crop maintained through the main crop's flowering stage, when pest pressure often peaks.
The trap crop can be removed once the main crop is past the pest's risk window for the season.
The field issues that come up most, and how to stay ahead of them.
The numbers that decide whether this pays for itself, and how soon.
Initial Investment
₹300–₹500/ha for trap crop seed
Additional Income
Main crop yield protection at a fraction of full-field spray cost
Estimated Savings
₹5,000+/ha in pesticide and spray labour
ROI
200%+ in a season with genuine pest pressure
Payback Period
Same season
The schemes that fund the machinery and inputs behind this technique.
Run the real numbers on your own field with these calculators.
Trap crops vs whole-field spraying, side by side on your own numbers.
Read guideWeigh the trap-crop seed cost against the pesticide saving it typically buys.
Read guideWork out seed quantity for the border or strip area you plan to sow.
Read guideLong-form reading that goes deeper on this technique and what sits beside it.
A trap crop is a border or strip crop that the target pest prefers over your main crop, pulling the pest away from the field that actually matters — you then spray only the small trap strip if needed, and the main crop mostly skips the spray entirely.
When the pest genuinely concentrates on the trap crop, spraying is confined to the 5–10% border strip instead of the whole field, which typically saves ₹5,000 or more per hectare in pesticide and spray labour.
Trap crops proven for the specific pest pressure in your area are the ones to use — check with your nearest KVK for the pairing that matches your region's known cotton pest, since the choice varies by which pest is the actual problem.
1–2 weeks ahead of the main crop, so it is already established and attractive to the pest by the time the pest population arrives — sowing it at the same time as the main crop often misses this advantage.
Only if pest numbers on it cross a damaging level — apply the same threshold-based logic used in IPM, spraying the small trap strip rather than the whole field.
Intercropping grows two crops together for their combined yield. A trap crop is grown specifically to attract and hold a pest away from the main crop — its own yield is secondary to its pest-management role.
No — they are one tool inside an integrated approach, working alongside scouting, biological control and, when genuinely needed, targeted chemical spray on the trap strip itself.
Yes — it needs only the seed for a small border strip, making it one of the lowest-cost pest-management tools available, well suited to smallholders looking for a first step beyond routine spraying.
The FAQs above cover the common questions. For a choice tuned to your exact soil, crop and holding size, your nearest Krishi Vigyan Kendra is the authoritative next step.
