Gibberellic Acid (GA3) | Plant Growth Regulator

Active Ingredient: Gibberellic Acid (GA3)

Function: Plant growth regulator (PGR) derived from fungal fermentation (e.g., Gibberella fujikuroi).

Primary Uses: Promotes growth, breaks seed dormancy, enhances fruit set, and delays senescence in crops.

Key Features & Benefits

  1. Growth Promotion:
    • Stimulates cell elongation and division in stems, leaves, and fruits.
    • Reduces fruit drop and enhances fruit size (e.g., grapes, tomatoes).
  2. Dormancy Breakage:
    • Accelerates germination in seeds (rice, barley, potatoes).
    • Induces sprouting in tubers and bulbs.
  3. Quality Improvement:
    • Promotes seedless fruit development (e.g., grapes).
    • Extends shelf life in fruits (watermelon, cherries) by delaying ripening.

Applications by Crop

Crop Dosage (mg/L) Application Method Desired Effect
Rice 25–55 Foliar spray (parent plant) Promotes sprouting and yield
Barley 1 Seed soaking before sowing Accelerates germination
Grapes 20–50 Spray on young fruits Increases fruit size and quality
Tomatoes 5–10 Spray on flowers Enhances fruit set and size regulation
Potatoes 0.5–1 Stem soaking (30 minutes) Breaks dormancy and induces sprouting
Watermelon 10–50 Pre-harvest fruit spray Extends storage freshness
Lettuce 100–1000 Foliar spray (seedling stage) Regulates flowering time

Formulations & Packaging

  • Solid Formulations:
    • 90% TC (Technical Compound), 40% WP, 20% WP (1kg/bag, 25kg/drum).
    • Tablets (TB): 20% (5g/tablet), 10% (10g/tablet).
  • Liquid Formulations:
    • EC/SC: 200L/drum, 20L/drum, 1L/500mL bottles.

Mechanism of Action

  • Hormonal Regulation: Mimics natural gibberellins in plants, activating genes responsible for growth-related proteins (e.g., expansins).
  • Physiological Effects:
    • Induces α-amylase production in germinating seeds (e.g., barley).
    • Inhibits abscisic acid (ABA) to break dormancy.
    • Promotes gibberellin-sensitive signaling pathways for stem elongation.

Safety & Environmental Notes

  • Toxicity: Low toxicity to mammals (LD₅₀ > 5000 mg/kg), but avoid direct contact with eyes/skin.
  • Environmental Impact: Biodegradable in soil/water; minimal residue when used at recommended rates.
  • Storage: Store in cool (≤25°C), dry place; protect from light and moisture.

Regulatory Compliance

  • Compliant with ISO 9001 and global agricultural standards (e.g., FAO guidelines).
  • Registered for use in major crops worldwide (check local regulations for specific approvals).
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