August 14, 2026
For commercial growers, packing facilities, and exporters of high-value perishable crops (such as table grapes, strawberries, blueberries, cherries, and tomatoes), Grey Mold (Botrytis cinerea) is one of the most destructive post-harvest storage diseases.
Applying G-Teck Agricultural Chitosan Oligosaccharide Powder 7 to 14 days prior to harvest provides a proven, zero-residue strategy to suppress Botrytis cinerea decay and significantly extend cold-chain marketability.
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Foliar applications of G-Teck Agricultural Chitosan Oligosaccharide Powder before picking protect fruit tissues in post-harvest cold storage through three synchronized biochemical mechanisms: |
Chitosan oligosaccharide carries a dense positive charge due to its free protonated amino groups. In contrast, the outer cell walls and conidial membranes of Botrytis cinerea are negatively charged. Upon contact, electrostatic interaction disrupts the fungal phospholipid bilayer, triggering rapid cytoplasmic electrolyte leakage, inhibiting spore germination, and arresting hyphal elongation before the fungus can penetrate fruit lenticels or micro-wounds.
Because G-Teck’s chitosan oligosaccharide is enzymatically hydrolyzed into low-molecular-weight chains, it is rapidly recognized by plant membrane receptors. This triggers Systemic Acquired Resistance (SAR), priming the fruit peel with key defense enzymes:
Chitinase & beta-1,3-Glucanase: Directly digest and degrade incoming fungal cell walls.
Phenylalanine Ammonia-Lyase (PAL) & Peroxidase (POD): Accelerate the synthesis of endogenous phytoalexins, phenolic compounds, and lignin, reinforcing the epidermal barrier against latent mycelial development during cold storage.
Upon drying on the fruit cuticle, chitosan dries into a microscopic, transparent, and breathable bio-film. This film acts as a mechanical barrier against secondary post-harvest spore cross-contamination while modulating internal gas exchange. By moderating fruit respiration and suppressing ripening-related ethylene spikes, the peel maintains firmness and natural resistance against fungal invasion.
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Evaluation Parameter |
Untreated Cold Storage Control | Synthetic Post-Harvest Fungicide | G-Teck Chitosan Oligosaccharide |
| Botrytis Decay Incidence | High (25% - 45% rot over 21 days) | Low (5% - 10% rot) | Low (<8% rot over 21 days) |
| Mode of Action | None (Passive post-harvest breakdown) | Single-site chemical inhibition | Triple Action (Direct lysis + SAR + Bio-film) |
| Fungicide Resistance Risk | High baseline pathogen spread | High (Prone to Botrytis resistance strains) | Zero (Multi-site biophysical mode of action) |
| Chemical Residue / MRL Status | N/A | Strict export limits & withholding periods | 100% Residue-Free; Zero MRL restrictions |
| Flesh Firmness Retention | Rapid softening due to pectin breakdown | Variable | Sustained (Inhibits pectinolytic enzymes) |
Pre-Harvest Application Timing: Apply G-Teck Agricultural Chitosan Oligosaccharide Powder as a comprehensive canopy spray 7 to 10 days BEFORE harvest, with an optional follow-up spray 48 to 72 hours prior to picking for maximum surface bio-film uniformity.
100% Water Soluble & Invisible Finish: The ultra-pure, light-yellow micro-powder dissolves instantly into a clear liquid. It leaves zero chalky marks, chemical spots, or sticky residues, preserving natural bloom on table grapes and berries.
Global Clean-Label Export Compliance: As a naturally derived, 100% biodegradable biostimulant, G-Teck Chitosan allows commercial exporters to pass the strictest zero-residue food safety audits in the EU, North America, and Asian markets.
⚡ Protect Your High-Value Harvest from Grey Mold in Cold Storage
For Fruit Packing Houses & Commercial Orchard Operations: Looking to eliminate post-harvest Botrytis rot and secure premium export valuations? Inquire Now to receive our official "Pre-Harvest Chitosan Application & Post-Harvest Botrytis Suppression Protocol" along with commercial factory-direct volume pricing.
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