Sulfocalcic solution
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Calcium polysulfide
Natural animal care Plant vitality Bio-input
Valid for both plant and livestock use
Crop: Peach tree
Species: Sheep — Sex: Both / either
A traditional preparation made from sulfur and quicklime, produced by decoction, and referenced for generations in the literature on organic agriculture and livestock farming: in crop cultivation, it is applied during the tree’s winter dormancy; for livestock, it is traditionally used in baths or as a skin lotion. It adheres well to the surface if it does not rain after application.
When to use: Routinely Occasionally
Application description: Apply as a foliar spray during the coolest part of the day (evening), avoiding direct sunlight and temperatures above 28–30 °C (risk of phytotoxicity). Wear full protective gear during preparation and application (caustic product). Repeat every 10–15 days depending on the season and crop needs, observing the pre-harvest interval.
Apply preferably in the winter, when the tree is dormant (leafless), to prevent leaf burn—never during flowering or in high temperatures. Dilute before use (typically 1 part concentrate to 10–20 parts water, depending on the crop) and apply during the coolest hours of the day. For use on livestock (baths or skin lotions), dilute to a higher ratio and always test on a small area of skin before applying to the entire animal—avoid contact with eyes and mucous membranes. Always wear gloves, goggles, and a mask when handling it, due to its strong odor and concentrated corrosive nature.
In a heat-resistant pot, combine 2 kg of powdered sulfur and 1 kg of quicklime for every 10 liters of water. First, add a little water to the quicklime to slake it, then gradually stir in the sulfur, stirring constantly to prevent lumps from forming. Add the remaining water and bring to a boil, then simmer for 45 to 60 minutes over medium heat, stirring every few minutes, until the mixture takes on a characteristic reddish-orange color. Let it cool and sit overnight—the next day, decant the clear liquid (the sulfocalcic solution itself) by separating it from the sediment at the bottom. Filter it through a strainer or cheesecloth before transferring it to a dark or opaque glass container with a tight-fitting lid.
A reddish-orange to dark brown liquid with a strong, pungent odor (sulfur/rotten eggs) and a slightly cloudy texture. It keeps well in a sealed container protected from light, although sediment may form over time—shake well before use.
Traditional practices in organic farming and livestock raising, documented in numerous manuals on traditional farming and livestock raising—which have been in the public domain for over a century. Reference content—the creator of this entry may add a specific source here; López, Juanfran (2022). The Biofertiliser Manual, 2nd edition. www.juanfranlopez.com; SADER and INIFAP (2021). Manuales prácticos para la elaboración de bioinsumos, no. 5: Caldo sulfocálcico (in Spanish). Technical Support Strategy, Mexican Ministry of Agriculture; Prybys, Grégory. Field technical notes (in French); Chilean Ministry of the Environment, GEF Montaña project and INDAP (2021). Manual de bioinsumos para biofábrica (in Spanish).
Recipe written in our own words by biopreparados.es. Copyright and sources
Grégory PRYBYS
Tel: — WhatsApp: +5491121570868
Country: Argentina
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