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Proposal for Maintaining Freshness in Crop Cultivation, Distribution, Storage, and Export via a Sterilization and Disinfection Solution Using “Pure O2” High-Concentration Chlorine Dioxide Liquid.

 

* Strategy for Innovation in the Crop Cultivation Industry and Strengthening Export Competitiveness Based on “Pure O2” High-Concentration 6,000 ppm Chlorine Dioxide (ClO2) Liquid.

 

1. Background and Necessity (Executive Summary)

 

The crop cultivation industry is a core industry both domestically and in many countries around the world. However, chronic diseases such as Gray Mold (Botrytis cinerea), Powdery Mildew (Sphaerotheca aphanis), Anthracnose (Colletotrichum gloeosporioides), Wilt (Fusarium Wilt, Fusarium oxysporum), and Late Blight (Phytophthora Root Rot), Rust, Downy Mildew, Bacterial Wilt, Soft Rot, Bacterial Leaf Spot, Canker, Mosaic Virus, Fusarium Wilt, Phytophthora Blight, Clubroot etc, along with short shelf lives after harvest, are obstacles to export expansion. This proposal presents a roadmap for leaping forward as a powerhouse exporting nation by optimizing cultivation environments using “Pure O2”’s 6,000 ppm high-concentration liquid chlorine dioxide and reducing post-harvest loss by over 40%.

 

① Disinfection before seedling cultivation and transplanting (Seedling Phase)

* Method: Before transplanting crop seedlings, immerse the root portions in a chlorine dioxide liquid with a concentration of 10–20 ppm for 5–10 minutes.

* Effect: Blocks pathogens transmitted through seedlings, such as anthracnose and wilt disease, thereby increasing the initial survival rate to over 95%.

 

② Nutrient Solution and Irrigation Sterilization (Irrigation Management)

* Method: Periodically moisten the roots in the hydroponic (Nutrient Film Technique/Substrate) nutrient solution tank with a ClO2 concentration of 5–10 ppm. (Root drenching system)

* Effect: Suppresses the growth of moss in the nutrient solution and increases oxygen concentration near the roots, thereby preventing and treating 'root rot'.

 

③ Humidity and Disease Management in Greenhouse Interior Space (Foliar & Air Control)

* Method: Spray the entire surface of the greenhouse 1–2 times a week using unmanned sprayers, ultra-low volume (ULV) sprayers, or misting systems at a ClO2 concentration of 20–30 ppm.

* Effect: Significantly suppresses **Powdery Mildew** and **Grey Mold**, which are chronic problems in crop cultivation.

* Method: 2. Standard Dilution Guide for the Use of “Pure O2” 6,000 ppm High-Concentration Stock Solution

* The 6,000 ppm ClO2 stock solution is a high-efficiency and high-cost product; depending on the purpose, it should be diluted with water (H2O) as follows.

 

Purpose of Use	Target Concentration (ppm)	Dilution Ratio (Concentrate: Water)	How ​​to Use
Space/Facility Disinfection	100 ~ 200 ppm	1 : 30 ~ 60	Spraying inside greenhouses before transplanting
Seedling Immersion Disinfection	20 ~ 30 ppm	1 : 200 ~ 300	Root immersion during seedling growth stage (10 min)
Soil/Nutrient Solution Irrigation	10 ~ 20 ppm	1 : 300 ~ 600	Injection into drip irrigation systems
Foliar Spraying/Pest Control	20 ~ 30 ppm	1 : 200 ~ 300	Use of unmanned sprayers and power sprayers
Washing for Freshness Preservation	30 ~ 40 ppm	1 : 150 ~ 200	Post-harvest gas fumigation and spraying

 

3. Detailed Strategy by Phase (Strategic Action Plan)

 

* Maximizing Cultivation Productivity (Production Phase)

 

- Zero Waste Rate Due to Disease: Sterilizes diseases such as gray mold (Botrytis cinerea), which can claim up to 40% of strawberry yields, without causing resistance.

 

- Optimizing Irrigation Systems: Removes microorganisms and biofilm from agricultural water to prevent drip nozzle clogging and increase fertilizer absorption rates.

 

- Enhancing Root Vitality: Promotes root development through oxygen supply to the soil during root irrigation, thereby improving fruit size and sugar content.

 

* Maintaining Freshness and Export Distribution (Post-Harvest & Export)

 

The biggest obstacle when storing and exporting agricultural products is their short shelf life.

 

- Removal of Ethylene Gas (Prevention of Spoilage): Oxidatively decomposes ethylene (C2H4), which accelerates strawberry aging, to maintain fruit firmness and freshness.

 

* * Gas ​​Fumigation Technology: Considering the characteristics of agricultural products, such as softening during liquid washing or the difficulty of maintaining freshness for extended periods, a product that continuously emits ClO2 gas is used to eliminate mold spores on the surface of the produce as well as bacteria and viruses within the environment.

 

- Shelf Life Extension: By extending the existing short shelf life to 15–20 days, it revolutionizes logistics costs by shifting from air freight exports to long-term exports via refrigerated containers utilizing ClO2 gas fumigation.

 

① Post-Harvest Gaseous Treatment Method: Harvested strawberries are placed in a sealed storage room (pre-cooling room) and fumigated with chlorine dioxide gas at a concentration of 5–10 ppm for 30 minutes.

 

- Advantages: Both liquid washing and gas treatment completely remove microorganisms from the surface without causing the fruit to soften.

 

② Ethylene Gas Removal and Respiration Inhibition Method: Products that continuously emit ClO2 gas are placed inside export packaging boxes, storage rooms, or container interiors. - Effect: By oxidizing and decomposing the ethylene gas naturally generated by strawberries, it prevents fruit softening and maintains the fruit's unique aroma and sweetness.

 

4. Expected Benefits of Introducing Liquid Chlorine Dioxide and Gas Fumigation

 

* Securing Export Competitiveness: Producing 'Zero-Residue' agricultural products free from concerns regarding pesticide residues allows for passing stringent quarantine standards in the EU, Korea, and the Middle East.

 

- Cost Reduction: The 6,000 ppm high-concentration liquid ClO2 product has a small volume for transportation and storage, resulting in lower logistics costs; furthermore, it enables extensive disinfection even with small quantities.

 

- Eco-friendly National Image: By using liquid ClO2 that does not generate carcinogens (THMs), it establishes a premium eco-friendly image in the agricultural sector.

 

* Executive Summary

 

- Increased Productivity: Expected 40% reduction in disease loss rates and a 40% improvement in yield due to the harvesting of high-quality fruit.

 

- Ensuring Safety: Easier acquisition of Global GAP certification through the production of eco-friendly strawberries free from pesticide residue issues. - Expanded Export Range: With shelf life extended by more than 2 to 3 times compared to existing methods, long-distance export transportation via sea containers is possible in addition to air transport.

 

- Cost Reduction: Production unit costs are reduced by lowering dependence on expensive imported pesticides and utilizing environmentally friendly and effective liquid chlorine dioxide products.

 

5. Conclusion and Proposals (Expert Conclusion)

 

Chlorine dioxide will not be merely a simple sterilizer or disinfectant, but will become a core technology that determines the harvest and export lifespan of agricultural products. 

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