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Macerated onion juice

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Macerated onion juice

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Plant vitality Maceration Plant-based

Maceration

Cold extraction by prolonged soaking of the plant material in a liquid (water, oil or alcohol depending on use), without heat. The longer contact time than an infusion extracts compounds that cold water alone would dissolve too slowly.

Process summary

1) Chop or crush the plant material. 2) Fully submerge it in the chosen liquid, in a closed container. 3) Let it sit in a cool, dark place, stirring occasionally, for anywhere from several hours to several days depending on the preparation. 4) Strain and use the resulting liquid.

See all preparation methods

 ✅ Authorised (some countries) Bio-inputs in BurundiBio-inputs in ColombiaBio-inputs in Costa RicaBio-inputs in IndonesiaBio-inputs in IndiaBio-inputs in KenyaBio-inputs in South KoreaBio-inputs in MoroccoBio-inputs in PeruBio-inputs in the PhilippinesBio-inputs in RwandaBio-inputs in TanzaniaBio-inputs in UgandaBio-inputs in South SudanBio-inputs in the Congo - KinshasaBio-inputs in Somalia

Onions crushed and macerated for a day in water, used on vegetables by peri-urban farmers in Medellín.

Application

Application description: Sprayed on vegetables as soon as it is ready.

Dose: 1 part juice to 3 parts water, plus one teaspoon of emulsifying oil.

Tips

Irritates the eyes when crushing: work in a ventilated place. Does not keep: make just before use. Before any use, check your country's regulations: in the EU, a homemade preparation presented for plant-protection use is not authorised.

Preparation process

1. Crush the onions.
2. Put them in the water, cover and leave for 24 hours.
3. Filter.

Ingredients

  • Water ⓘ — 0.264 gal
  • Vegetable oil ⓘ
  • Onion ⓘ — 8 Units (pieces)
  • For 1 L: 8 onions; 1 L rain or standing water; emulsifying oil (one teaspoon per application).

Tools and equipment

  • Strainer or filter cloth
  • Manual or backpack sprayer
  • Mortar or crushing tool

Preparation time

24 hours; use as soon as it is ready.

Product obtained

Cloudy liquid with a strong onion smell.

Source / Reference

IPES, RUAF Foundation and FAO (2010). “Biopreparados para el manejo sostenible de plagas y enfermedades en la agricultura urbana y periurbana”, ¿Cómo hacerlo? series, sheet n.º 33, validated by Corporación Ecológica y Cultural Penca de Sábila and the Boquerón farmers' association (San Cristóbal, Medellín, Colombia): https://www.fao.org/3/a-as435s.pdf — guide also circulated by Portal Frutícola. Recipe written in our own words.

Recipe written in our own words by biopreparados.es. Copyright and sources

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Contact person

Grégory Prybys
Tel: +33 7 75 76 37 70 — WhatsApp: +54 9 11 2157 0868
Country: Argentina

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Regulatory status

✅ Authorised in Burundi, in Colombia, in Costa Rica, in Indonesia, in India, in Kenya, in South Korea, in Morocco, in Peru, in the Philippines, in Rwanda, in Tanzania, in Uganda, in South Sudan, in the Congo - Kinshasa and in Somalia Bio-inputs in BurundiBio-inputs in ColombiaBio-inputs in Costa RicaBio-inputs in IndonesiaBio-inputs in IndiaBio-inputs in KenyaBio-inputs in South KoreaBio-inputs in MoroccoBio-inputs in PeruBio-inputs in the PhilippinesBio-inputs in RwandaBio-inputs in TanzaniaBio-inputs in UgandaBio-inputs in South SudanBio-inputs in the Congo - KinshasaBio-inputs in Somalia

Bio-inputs in Burundi Authorised bio-preparations: Burundi
Bio-inputs in Colombia Authorised bio-preparations: Colombia
Bio-inputs in Costa Rica Authorised bio-preparations: Costa Rica
Bio-inputs in Indonesia Authorised bio-preparations: Indonesia
Bio-inputs in India Authorised bio-preparations: India
Bio-inputs in Kenya Authorised bio-preparations: Kenya
Bio-inputs in South Korea Authorised bio-preparations: South Korea
Bio-inputs in Morocco Authorised bio-preparations: Morocco
Bio-inputs in Peru Authorised bio-preparations: Peru
Bio-inputs in the Philippines Authorised bio-preparations: Philippines
Bio-inputs in Rwanda Authorised bio-preparations: Rwanda
Bio-inputs in Tanzania Authorised bio-preparations: Tanzania
Bio-inputs in Uganda Authorised bio-preparations: Uganda
Bio-inputs in South Sudan Authorised bio-preparations: South Sudan
Bio-inputs in the Congo - Kinshasa Authorised bio-preparations: Congo - Kinshasa
Bio-inputs in Somalia Authorised bio-preparations: Somalia

In the EU, this preparation is not an approved basic substance: a homemade preparation presented for plant-protection use is not authorised there. Plant preparations and extracts appear on the official lists of inputs permitted in organic farming of: Burundi, Colombia, Costa Rica, Indonesia, India, Kenya, South Korea, Morocco, Peru, Philippines, Rwanda, Tanzania, Uganda, South Sudan, DR Congo, Somalia. Depending on the country, the certification body's approval may be required: see each country's page.

Official texts

What the icons mean: ✅ Authorised ⚠️ Tolerated 🟠 Not prohibited ⛔ Not authorised EU 🔎 Status being verified Full details →

Documentary information, checked on 26/10/2026. Not a substitute for legal advice; regulations may vary from country to country. See the regulations · Substances authorised in Europe

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