biopreparados.es

Willow Bark (Salix spp.) Infusion

Willow Bark (Salix spp.) Infusion

Plant vitality Infusion Plant-based

Infusion

Cold or just-off-the-boil water is poured over the plant material and left to steep without boiling. Ideal for delicate plant parts (leaves, flowers) whose active compounds would break down under prolonged heat.

Process summary

1) Chop or crush the plant material. 2) Pour hot water (just off the boil, not boiling the material itself) over it. 3) Cover and let steep for 10 to 30 minutes depending on the plant. 4) Strain and use the resulting liquid, diluted if needed.

See all preparation methods

✅ Authorised EU

An amber to light brown infusion with a woody, slightly bitter aroma; clear after filtration. Use within 24 hours. Results are not guaranteed: they depend on the preparation, the time of use, and local conditions.

Application

When to use: Routinely and occasionally

Opportunist: Powdery mildew (Fungus) Downy mildew (Fungus) Scab (Fungus) Peach leaf curl (Fungus)

Warning: the associations between recipes and opportunists come from other references (traditional practices, publications, user feedback). They are neither a recommendation nor a claim of effectiveness. There is no certainty regarding the preparation, application and use of these bio-preparations. See the regulations

Application description: Use approved by Implementing Regulation (EU) 2015/1107 and its review report: fungicide. Grapevine: downy mildew and powdery mildew (BBCH 10–57). Apple trees: speckled leaf spot and powdery mildew (BBCH 53–67). Peach and plum trees: scab (Taphrina deformans), in the spring. Apply during rainy weather, not in hot conditions.

Dose: Approximately 222 g of bark per hL. Arboriculture: 500–1,000 L/ha (1.1–2.2 kg of bark per ha). Vines: 100–300 L/ha (0.22–0.67 kg/ha). Total: 2–5 kg/ha according to the French list. 1–6 applications, at intervals of at least 7 days.

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Regulatory status

✅ Authorised in the EU

Bio-preparations authorised in the European Union
Authorised bio-preparations: Burundi
Authorised bio-preparations: Colombia
Authorised bio-preparations: Costa Rica
Authorised bio-preparations: Indonesia
Authorised bio-preparations: India
Authorised bio-preparations: Kenya
Authorised bio-preparations: South Korea
Authorised bio-preparations: Morocco
Authorised bio-preparations: Peru
Authorised bio-preparations: Philippines
Authorised bio-preparations: Rwanda
Authorised bio-preparations: Tanzania
Authorised bio-preparations: Uganda

Basic substance approved in the EU (Regulation (EU) 2015/1107). May be used without a product authorization, solely for the uses, doses, and preparation methods described in its review report. Approved for use in organic production. Its ingredients also 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. Depending on the country, some are only allowed under conditions (certification body approval, maximum doses): 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 19/10/2026. Not a substitute for legal advice; regulations may vary from country to country. See the regulations · Substances authorised in Europe

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