Meet ozone: an eco-friendly solution that offers a multitude of benefits, from irrigation to storage. In this article, Lies van Geest of Tuprotec explains how ozone can be a game-changer, particularly in the areas of disease control, pest control, irrigation and post-harvest storage.
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Disease control
One of the primary advantages of using ozone in greenhouses is its effectiveness in controlling and preventing diseases. As a powerful oxidant, ozone can eliminate a wide range of pathogens, including bacteria, viruses, and fungi.
Ozone is utilized to disinfect greenhouse surfaces, tools, and equipment, thereby reducing the risk of disease transmission. This is especially crucial in controlled environments where diseases can spread quickly and cause significant damage. Regular ozonation of surfaces helps maintain a sterile and safe environment for plant growth.
Additionally, ozonized air can circulate within the greenhouse to eliminate airborne pathogens, promoting a healthier growing environment. By maintaining an atmosphere free of pathogens, the risk of diseases such as powdery mildew and botrytis is significantly reduced. This ongoing disinfection process offers an efficient and effective layer of protection.
Lies adds, "Ozone is also used for soil treatment, effectively eliminating pathogens without relying on harmful chemicals. Soil-borne diseases like Fusarium wilt and Verticillium wilt can be managed through regular ozone treatments. This approach not only eradicates pathogens but also preserves the natural balance of beneficial microorganisms in the soil, fostering healthier plant growth."
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Pest management
In addition to disease control, ozone is also effective in managing pests. Its strong oxidizing properties can repel certain pests, reducing the reliance on chemical pesticides. Ozone in the greenhouse environment can deter pests like aphids, whiteflies, and spider mites, which are common issues.
Ozone can destroy the eggs and larvae of pests, disrupting their life cycle and preventing infestations. By targeting the early stages of pest development, ozone helps decrease the overall pest population and minimizes the risk of severe infestations.
By using ozone, growers can reduce their dependence on chemical pesticides, resulting in lower pesticide residues on crops. This is particularly advantageous in meeting the increasing consumer demand for organic and chemical-free produce. Additionally, reducing chemical usage helps protect the environment and supports sustainable agricultural practices.
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Irrigation
Water quality is essential in greenhouse cultivation, and ozone can play a significant role in enhancing it.
"Ozonizing irrigation water eliminates pathogens, ensuring that the water used for plants is free from harmful microorganisms. This is particularly important for preventing water-borne diseases such as Pythium and Phytophthora, which can lead to root rot and other issues."
Ozone also aids in breaking down organic matter in water, making nutrients more accessible to plants. Improved nutrient availability results in healthier plants and better yields. Ozonized water can enhance the uptake of essential minerals and nutrients, supporting robust growth and fruit development.
Furthermore, ozone helps prevent biofilm formation in irrigation systems, which can harbor pathogens and clog equipment. Regular ozone treatments keep the irrigation system clean and efficient, reducing maintenance costs and ensuring a consistent water supply to plants.
Post-harvest storage
The benefits of ozone extend beyond the growing stage to post-harvest storage, helping to maintain quality and extend the shelf life of vegetables.
Lies explains, "Ozone can break down ethylene, a natural ripening agent, which slows the ripening process and extends shelf life. Managing ethylene levels is crucial to prevent premature ripening and over-ripening, which can lead to spoilage and waste. By controlling ethylene, ozone helps maintain the firmness and freshness of vegetables for longer periods."
Ozone is also effective in combating the growth of mold and bacteria on vegetables and flowers in storage, reducing spoilage. Mold and bacteria are common post-harvest issues that can spread rapidly and ruin entire batches of produce. Ozone treatment provides an additional layer of protection, ensuring that vegetables remain safe and edible.
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Environmental and economic benefits
Ozone naturally decomposes back into oxygen, leaving no harmful residues, making it an environmentally friendly alternative to chemical treatments. Unlike traditional pesticides and fungicides, ozone does not contribute to environmental pollution or pose risks to human health. Its use supports sustainable agricultural practices and helps reduce the carbon footprint of greenhouse operations.
While the initial investment in ozone generation equipment can be substantial, the long-term savings from reduced chemical use, a lower incidence of pests and diseases, and extended product shelf life can make it cost-effective. Reduced reliance on chemical treatments also translates to lower costs for purchasing pesticides and fungicides. Additionally, healthier plants and longer-lasting vegetables can command higher market prices, potentially increasing income for growers.
Tuprotec
Tuprotec B.V. is a horticultural engineering consultancy that translates a client's ideas and wishes into an integrated and efficient horticultural project. Treatment with ozone is one of their focus areas.
For more information:
Tuprotec / O 3 tech
Tel: 06 5321 8754
info@Tuprotec.nl
www.tuprotec.nl/