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Bio Stimulants

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July 24, 2025

Mains: GS III – Science and Technology | Developments and their Applications and Effects in Everyday Life | Bio-technology and issues relating to Intellectual Property Rights.

Why in news?

Recently, the Indian farmers has raised complaints about the inefficacy of the bio stimulants.

What are bio stimulants?

  • Definition – It is a substance or microorganism or a combination of both whose primary function when applied to plants, seeds or rhizosphere is to stimulate physiological processes in plants.
  • Purpose – It is to enhance its nutrient uptake, growth, yield, nutrition efficiency, crop quality and tolerance to stress.

Rhizosphere is the area around a plant root that is inhabited by a unique population of microorganisms, influenced by the chemicals released from plant roots.

  • Constituents – Plant-derived waste materials and seaweed extracts.
  • Application

Bio stimulants 1

  • Working

Bio stimulants 2

Why they need to be regulate in India?

Bio Stimulant Market in India

  • Current value - The India bio stimulants market size was valued at USD 355.53 million in 2024.
  • Future projections - The market is projected to grow from USD 410.78 million in 2025 to USD 1,135.96 million by 2032, exhibiting a CAGR of 15.64% during the forecast period.

Compound Annual Growth Rate (CAGR), is a way to describe the average annual growth rate of an investment over a specified period

  • Absence of classification - Bio stimulants did not fall under the existing fertilizer or pesticide categories.
  • Unregulated sale - They were sold in the open market without government approval for a long time.
    • Around 30,000 bio stimulant products had been sold unchecked for several years in India.
  • Increased sale - As the sale of bio stimulants increased over the years, it is high time for Centre’s regulation.

How they are regulated in India?

  • Control orders – The Fertilizer (Inorganic, Organic or Mixed) (Control) Order (FCO), 1985, regulates the manufacturing and sale of bio stimulants.
  • They are issued under the Essential Commodities Act, 1955, and makes changes to it from time to time.
  • In 2021, FCO was amended to include bio stimulants, paving the way for their regulated manufacturing, sale and import.
  • Judicial intervention - In 2011, the Punjab and Haryana High Court held that ‘any manufacturer producing a bio product claiming to be a substitute for insecticides or fertilizer, but not covered under the rules, was to apply to the respective Director General of Agriculture, in the case of Haryana and Punjab.
  • This paved the way for states to take samples of these products and check them before allowing their sale to farmers.
  • Frameworks – In 2017, NITI Aayog and the Agriculture Ministry started working on a framework for bio stimulants.

Recent Regulation Guidelines

  • Time limit for sale - According to the FCO order, manufacturers could make and sell bio stimulants for 2 years if they made an application for provisional registration.
  • Extension of permission – The 2 year deadline was extended continuously which allowed most of the manufacturers to continue production and selling bio stimulants.
  • Recent Extension – In March 2025, the bio stimulants’ sale was allowed for 3 months until June 16, 2025.
  • It applied to all companies manufacturing or importing a bio stimulant, for which no standards were specified.
  • Prohibition on sale - With the March 17 notification having expired, the companies having provisional certificates and stocks of bio stimulants cannot sell their products in the market now.
  • Specifications of Bio stimulants - Tomato, chilli, cucumber, paddy, urinal, cotton, potato, green gram, grape, hot pepper, soybean, maize, and onion.

Provisional registration is a temporary approval granted to fertilizer manufacturers or dealers, while regular registration is the long-term, permanent registration.

How did FCO regulate bio stimulants?

  • Fixing of conditions - The inclusion of bio stimulants empowered the Central government to fix specifications.
  • Classification – Bio stimulants specified in Schedule VI of the FCO are classified into 8 categories.
    • For example, it includes botanical extracts (as well as seaweed extracts), bio-chemicals, vitamins, and antioxidants.
  • Submission of application – Every manufacturer or importer of a bio stimulant shall make an application to the Controller of Fertilizers along with the requisite product information.
  • Disclosure of information - The product’s chemistry, source (natural extracts of plant/microbe/animal/synthetic), shelf-life, reports of bio-efficacy trials, and toxicity must be submitted, along with other data.

5 Basic Acute Toxicity Tests

4 Eco-toxicity Tests

  • Acute oral (Rat)
  • Acute dermal (Rat)
  • Acute Inhalation (Rat)
  • Primary skin Irritation (Rabbit)
  • Eye irritation (Rabbit)
  • Toxicity to birds
  • Toxicity to Fish (Freshwater)
  • Toxicity to honeybees
  • Toxicity to earthworm

 

  • Acceptable limit – No bio stimulant shall contain any pesticide beyond the permissible limit of 0.01 ppm (parts per million).
  • Agronomic Bio-efficiency trials – It shall be conducted under the National Agricultural Research System, including the Indian Council of Agricultural Research and state agricultural universities.
  • The trials shall be conducted at minimum 3 different doses for one season at three agro-ecological locations.
  • Central Bio stimulant Committee – It was constituted for 5 years, with the Agriculture Commissioner as its Chairperson and 7 other members.
  • It shall advise the Centre on
    • Inclusion of a new bio stimulant
    • Specifications of various bio stimulants
    • Methods of drawing of samples and its analysis
    • Minimum requirements of laboratory
    • Method of testing of bio stimulants
    • Any other matter referred to it by the central government.

What lies ahead?

  • Institutions like the ICAR could evaluate bio stimulants to uphold the trust of farmers and ensure their technical usefulness.
  • Only those bio stimulants that meet all the criteria of scientific validation and are proven beneficial to farmers could be approved.

Reference

The Indian Express| Regulation of Biostimulants in India

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