Ascophyllum nodosum 20% (liquid)
A seaweed extract biostimulant in liquid form, notified under FCO Schedule VI. Key notified measures: Alginic acid ≥ 1.5 % w/w; Mannitol ≥ 0.5 % w/w. Notified for chilli, paddy (rice), cotton, chickpea (bengal gram), tomato, soybean and wheat.
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Composition
As notified in the Gazette, ingredient by ingredient.
| Ingredient | Content | Limit | |
|---|---|---|---|
| i | Seaweed (Ascophyllum nodosum) extract per cent. by weight, minimum | 20% w/w | Minimum |
| ii | Sodium salt of Propyl Paraben per cent. by weight, minimum | 0.25% w/w | Minimum |
| iii | Water per cent. by weight, maximum | 79.75% w/w | Maximum |
| iv | Total (per cent.) | 100 | Exact / specified |
Specifications (label claims)
The parameters a sample must meet, with the Part D method used to test each one.
| Parameter | Notified value | Test method | |
|---|---|---|---|
| i | Alginic acid per cent. by weight, minimum | 1.5% w/w | Method 7: Detection and quantification of alginic acid |
| ii | Mannitol per cent. by weight, minimum | 0.5% w/w | Method 10: Estimation of mannitol |
| iii | pH (1 % aqueous solution) | 7.5- 9.5pH | Method 1: Estimation of pH |
| iv | Total dissolved solids per cent. by weight, minimum | 45% w/w | Estimation of TDS/TSS |
| v | Total organic carbon per cent. by weight, minimum | 10% w/w | Method 4: Estimation of organic matter and organic carbon |
| vi | Specific gravity | 1.1- 1.3Specific gravity | Method 2: Estimation of specific gravity |
| vii | Solubility per cent. by weight, minimum | 98% w/w | Method 5: Estimation of water solubility |
Tolerance (Schedule VI Part B, S.O. 3922(E)): Seaweed Extract: Ascophyllum nodosum, Sargassum, Kappaphycus, Gracilaria and Ulva: 5% of the specified value of active ingredients or the tracer molecule.
Crops and doses
The Gazette wording is what counts; per-acre figures use 1 hectare = 2.47105 acres.
| Crop | Gazette dose | Per acre, each application | Per acre, season |
|---|---|---|---|
| Chilli | Four foliar applications at 625 ml/ha | 253 ml | 1.01 litre |
| Paddy (rice) | One soil application at 750 ml/ha | 304 ml | 304 ml |
| Cotton | Two foliar applications at 750 ml/ha | 304 ml | 607 ml |
| Chickpea (Bengal gram) | Three foliar applications at 750 ml | No automated per-acre conversion because the notified wording contains multiple or non-standard rates; verify manually. | — |
| Tomato | Three foliar applications at 1000 ml/ha | 405 ml | 1.21 litre |
| Soybean | Two foliar applications at 750 ml/ha | 304 ml | 607 ml |
| Wheat | Two foliar applications at 1000 ml/ha | 405 ml | 809 ml |
Notification history
- 13 Aug 2025S.O. 3741(E): entry inserted · superseded by a later entry
- 16 Feb 2026S.O. 876(E): entry substituted (full replacement)
Official notifications: Ministry of Agriculture & Farmers Welfare, biostimulant circulars.
Before you buy or stock it
- Check that the product name, composition and crop on the pack match this page.
- Use only the notified dose for your crop; the calculator converts it to your area.
- Ask the seller for the batch number and expiry date, and keep the bill.
Questions about your crop? Ask our agri expert on WhatsApp.
Show more seaweed biostimulants 52 others in this category
Consolidated by NanoKheti from the Gazette of India notifications under Schedule VI of the Fertiliser (Inorganic, Organic or Mixed) (Control) Order, 1985, for reference. The Gazette text is authoritative; this page is not legal advice. Check the notification before labelling, licensing or buying. Covers notifications up to S.O. 1574(E) (25 Mar 2026); checked for later Schedule VI changes on 19 October 2026. Questions? Ask our agri expert on WhatsApp.