Description
Brahmastra is a boiled extract of bitter leaves in cow urine. In natural farming it is traditionally used against larger caterpillars and heavier sucking-pest attacks, when Neemastra alone isn’t holding the line.
We don’t sell Brahmastra. The leaves grow around most Bengal farms, so it’s best prepared on your own farm at almost no cost. To learn it with us, request a farm visit.
Ingredients (for 1 acre)
| Desi cow urine | 20 litres |
| Neem leaves, pulped | 2 kg |
| Custard apple (sitaphal/ata) leaves, pulped | 2 kg |
| Papaya leaves, pulped | 2 kg |
| Pomegranate leaves, pulped | 2 kg |
| Guava leaves, pulped | 2 kg |
If one leaf isn’t available, farmers traditionally swap in another bitter local leaf such as karanj (Pongamia) or castor.
How to prepare
- Pound the leaves into a pulp and add them to the cow urine in a metal vessel.
- Bring to the boil and let it rise five times, then take off the heat.
- Cover and leave to cool for about 48 hours.
- Filter through a fine cloth.
How to use
- Dilute about 6–8 litres of Brahmastra in 200 litres of water for 1 acre.
- Spray when pest pressure is visible; repeat after 10–15 days if needed.
Storage & shelf life
Traditionally kept up to about 6 months in a closed container in the shade.
Good practice & safety
- Boil outdoors and wear gloves.
- Always dilute; spray in the morning or evening.
- Test on a few plants first.
Shared as traditional natural-farming knowledge. This is not a registered pesticide, and no specific level of pest control is promised. Results vary with pest, crop, climate and preparation.
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