Plant growth regulators listed in the Schedule to the Insecticides Act, 1968 are registered with CIB&RC in the same way as pesticides. A PGR file must establish identity and specification, demonstrate the claimed physiological effect on the named crop through multi-location trials, and address residue and safety. Products without a scheduled active and without a pesticidal claim may instead fall under the Fertiliser Control Order.
The classification question comes first
More PGR projects go wrong at the classification stage than at any other. A product containing a plant growth regulator listed in the Schedule to the Insecticides Act must be registered with CIB&RC — regardless of how it is marketed. A product based on seaweed extract, humic acid, amino acids or protein hydrolysates, making a physiological or stress-tolerance claim without a scheduled active, generally belongs under the Fertiliser Control Order as a bio-stimulant.
The commercial temptation is to describe a bio-stimulant in growth-regulator language, or to sell a scheduled PGR as a “plant tonic”. Both create enforcement exposure. Our first deliverable on a PGR enquiry is a written classification opinion, so you know which regime you are in before you invest.
Plant growth regulators we register
Gibberellic acid, ethephon in solution and paste forms, paclobutrazol, mepiquat chloride, chlormequat chloride, alpha naphthyl acetic acid (NAA), triacontanol in EC, EW and granular forms, forchlorfenuron (CPPU), homobrassinolide, hydrogen cyanamide, chlorpropham, prohexadione-calcium and sodium para-nitrophenolate formulations.
What a PGR dossier has to prove
- Identity and quality. Active content, related substances, five-batch analysis, specification and method of analysis. For low-dose actives such as triacontanol and brassinolides, the analytical method itself is often the hard part.
- Crop response. Multi-location, multi-season trials demonstrating the specific effect claimed — flowering, fruit set, internode length, ripening, tuber initiation, canopy management — with statistically meaningful design and untreated controls.
- Crop safety. Phytotoxicity observations, particularly at doses above the label rate, since PGR overdose effects are often dramatic and irreversible.
- Residue and waiting period. Especially for actives used close to harvest, such as ethephon on fruit, where residue data drives the pre-harvest interval on the label.
- Toxicology and ecotoxicology. To the extent required for the section and category applied under.
- Shelf life and packaging. Many PGR formulations are sensitive to temperature and light; shelf-life data must reflect Indian storage conditions.
Getting the label claim right
A PGR label is unusually constrained. The claim must state the crop, the growth stage of application, the dose, and the physiological effect — and nothing more. Yield claims that are not supported by trial data will not be accepted, and yet yield is exactly what the sales team wants printed. We draft claims that stay within what the data supports while remaining commercially usable, and we tell you at trial-design stage what a given claim will require you to prove.