Chemical Pesticide Alternative: BT

 What is Bt?

• A natural soil bacterium – not a synthetic chemical.

• Targets only caterpillars (leaf‑eating & fruit‑boring larvae).

• Available as liquid or wettable powder – easy to mix and spray.

✅ Why Choose Bt Over Chemical Pesticides?

⚔️ How Bt Works (Without Poisoning Your Farm)

• Must be eaten by the caterpillar.

• Within 30 minutes – stops feeding → no more crop damage.

• Dies in 1–5 days from gut paralysis and starvation.

• No secondary poisoning – breaks down in sunlight.

🎯 Which Pests Can You Control with Bt?

• Tomato fruit borer, brinjal shoot & fruit borer

• Cabbage looper, diamondback moth, leaf roller

• Pod borer in pulses, stem borer in rice/corn

• Armyworm, tobacco caterpillar, webworm

Does not work on sucking pests (aphids, mites, whiteflies) – use neem or soap for those.

🛠️ How to Apply Bt (Simple Dosage)

• Liquid Bt: 1–2 litres per acre in 200 litres water.

• Powder Bt: 1–2 kg per acre in 200 litres water.

• Spray in late evening (UV from sun destroys Bt).

• Cover both sides of leaves – caterpillars hide underneath.

• Reapply every 7–10 days and after heavy rain.

🌱 Integrating Bt Into Your Farming

• Use Bt as a preventive – spray when you see first tiny larvae or moth eggs.

• Rotate with other bio‑pesticides (e.g., Spinosad, NPV virus) to avoid resistance.

• Combine with pheromone traps, Trichogramma for full IPM.

• Safe for organic certification – OMRI listed.

⚠️ Small Precautions

• Do not mix with chemical fungicides or alkaline water (pH > 8).

• Store in cool, dark place – Bt is a living organism.

• Stop spraying 2–3 days before using any chemical insecticide.