Active Ingredient and Granular Technology
ProGibb Easy Soluble Granules is manufactured with Gibberellic Acid 40% formulated as water-soluble granules (WSG). Unlike legacy liquid GA3 formulations that rely on volatile organic solvents, the WSG matrix dissolves rapidly in water without dust or flammability risks.
Gibberellic acid acts endogenously as a diterpenoid plant hormone that promotes cell division and rapid internodal elongation, mobilizes starch reserves via amylase activation, and modifies flowering and cluster architecture.
- Active ingredient: Gibberellic Acid (GA3) 40 percent w/w
- Formulation type: Water Soluble Granule (WSG)
- Dissolution: Instant complete solubility without solvent fumes or sediment residue
- Regulatory approval: CIBRC registered for designated horticultural and commercial crops
Primary Viticulture Applications and Stages
In table grape cultivation (such as Thompson Seedless and Sharad Seedless), timing and precise concentration are critical to achieving target bunch conformation and berry diameter.
Applications span multiple phenological stages, beginning with rachis elongation, progressing through cluster thinning during bloom, and concluding with berry enlargement sprays during early pea-stage development.
- Rachis elongation: Pre-bloom spray to loosen bunch architecture and reduce fungal compaction
- Bloom thinning: Applied at 20-80 percent flowering to reduce berry set naturally
- Berry sizing: Multiple targeted bunch dips or low-drift directional sprays during 4-8 mm berry diameter
- Spray volume: Calibrated uniform wetting of bunches without excessive runoff
Calibration, Water Quality, and Usage Guidelines
Because Gibberellic Acid is active at parts-per-million (ppm) levels, measuring and mixing must follow precise dosage recommendations per label instructions. Water pH must be monitored, as alkaline water degrades GA3 active molecules rapidly.
Growers should maintain soil moisture and balanced potassium and calcium nutrition during berry sizing to ensure post-treatment fruit firmness and shelf-life stability.
- Water pH: Maintain tank spray water between pH 5.5 and 6.5 for optimal stability
- Nutritional balance: Combine hormonal sizing with balanced nitrogen, calcium, and boron
- Temperature threshold: Apply during morning hours to prevent rapid droplet evaporation
- Label compliance: Always follow CIBRC crop schedules to avoid vegetative imbalances
Official source
Check the latest rules, benefits and forms here. KisanPe is an independent platform and is not a government website.
Central Insecticides Board and Registration Committee (CIBRC) ↗Related on KisanPe
Common questions
What is the key advantage of ProGibb 40% WSG over liquid GA3 formulations?
ProGibb 40% WSG offers high chemical purity, zero volatile organic solvents, rapid dust-free dissolution, and precise ppm calculation without carrier degradation.
What happens if GA3 is applied at excessive concentrations?
Excessive concentrations can lead to shot-berry development, rachis necrosis, loose stem attachments, delayed fruit maturity, and compromised bud fruitfulness for the subsequent season.
Is a non-ionic surfactant required when applying ProGibb?
Manufacturers frequently recommend adding a certified non-ionic surfactant to improve spray spread and uptake on waxy berry cuticles, adhering to approved tank-mix ratios.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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