Active hormonal nature and physiological action
Gibberellic Acid 0.001% L contains GA3, a tetracyclic diterpene plant hormone that naturally regulates seed germination, stem elongation, and reproductive transition.
Upon foliar absorption, it stimulates the expression of hydrolytic enzymes that weaken plant cell walls, allowing turgor pressure to drive rapid cell elongation and vegetative tissue expansion.
- Active chemical: Gibberellic Acid (GA3) 0.001% L.
- Physiological function: Promotes cell division, stem elongation, leaf enlargement, and uniform flowering.
- Auxin interaction: Synergizes with endogenous plant auxins, strengthening fruit pedicel attachment to eliminate premature dropping.
Target crops and optimal growth stage application
The formulation is widely utilized across field cereals, pulses, vegetables, oilseeds, and commercial fruit orchards in India.
Spraying during active vegetative growth or initial flower bud differentiation maximizes branching, bloom retention, and fruit development.
- Vegetables (Tomato, Chilli, Brinjal): Sprayed during early branching and flower initiation to enhance fruit set and reduce blossom drop.
- Paddy & Wheat: Sprayed at tillering and panicle emergence to stimulate effective tillering and panicle elongation.
- Cotton: Applied during square initiation and flowering to promote sympodial branch development and boll retention.
- Grapes: Widely used for bunch elongation, berry loosening, and berry size enlargement.
Foliar spray dilution, mixing, and application precautions
Apply Gibberellic Acid 0.001% L as a fine foliar mist during early morning or late evening hours for maximum leaf absorption without rapid sun evaporation.
Adhere strictly to label-specified dilution rates, as excessive hormone concentrations can cause unnatural stem elongation or lodging.
- Dilution rate: Mix with clean water at container label recommended rates; do not arbitrarily overdose plant hormones.
- Spray coverage: Ensure uniform wetting of leaves, flower buds, and developing fruits using standard knapsack sprayers.
- Tank compatibility: Compatible with most neutral fertilizers and common insecticides; avoid mixing with strongly alkaline solutions.
Official source
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Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What is Gibberellic Acid 0.001% L used for in crops?
It is used as a plant growth regulator to stimulate cell elongation, increase flowering, prevent flower and fruit drop, and enhance yields.
When is the best time to spray Gibberellic Acid on vegetables?
It is best sprayed during active vegetative branching and at the onset of flowering or early fruit formation.
Does Gibberellic Acid help enlarge grape berries?
Yes, GA3 is the standard commercial growth regulator used in vineyards to elongate flower clusters and increase berry size.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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