Trap Crop & Lure the Pests Off the Main Crop

Trap crop area = total field area × trap percentage. Main net area = total − trap area. A border-strip width estimate comes from trap area ÷ field perimeter, telling you how wide a strip around the field that trap area makes. The tool runs all three so you can lay out the trap crop before sowing.

A trap crop is a more-attractive plant grown alongside or around the main crop to lure pests away from it. Pests prefer the trap crop, concentrate on it, and can then be controlled there — protecting the main crop with far less spraying. It's a core tactic in integrated pest management (IPM).

Marigold around tomato (for nematodes and fruit borer), mustard around cabbage (for diamondback moth and aphids), and many others where a preferred host draws the pest. The right trap depends on the pest and main crop pairing — choose a plant the target pest prefers over your cash crop.

Commonly a small share — often around 5–10% of the field as a border or strips — is enough to draw pests while keeping most land in the main crop. The exact figure depends on pest pressure and the crops involved. The tool lets you test any percentage and see the area trade-off instantly.

It estimates how wide a strip the trap crop makes if grown as a band around the field edge — trap area divided by the field perimeter. That helps you lay out rows and plan the planter or transplanting at the border, so the trap forms a continuous, effective barrier rather than scattered patches.

The trap crop must be attractive — flowering or at a preferred stage — when pests arrive, which is usually before or as the main crop becomes vulnerable. Sowing it a couple of weeks earlier ensures it's the more tempting host at the critical moment, so pests settle on it rather than the cash crop.

Scout the trap crop regularly, since it concentrates the pests. When infestation builds, spot-spray only the trap rows or physically destroy badly infested trap plants to kill the pest load — far less pesticide than treating the whole field, and it stops the trap from becoming a pest reservoir.

Yes — by concentrating pests on a small border area you spray a fraction of the field instead of the whole crop, cutting cost, residues and harm to beneficial insects. Combined with monitoring and thresholds, trap cropping is one of the most practical IPM tactics for many vegetable and field crops.

Yes — enter total field area and perimeter in acres, hectares, bigha, guntha or metres, and the tool returns trap and main areas plus strip width in matching units. The percentage-and-perimeter approach applies to any field, crop pairing or region.

They're planning figures. Effective trap-crop ratio and width vary with the pest, the crop pairing, field shape and pest pressure. Use the tool to lay out the trap crop, then adapt from scouting — widen the strip or raise the percentage if the trap saturates, and confirm the pairing with local IPM advice.