The benefits of UV-C in horticulture

In modern greenhouse horticulture, efficiency and sustainability are key. Growers want to make the best use of water and nutrients without compromising crop health. Reusing drain water is a logical step in this process, but it also comes with risks: How can the spread of plant pathogens through irrigation systems be prevented?

"Many growers want to reuse their drain water but are concerned about the risk of disease transmission – and rightly so," says Ruben Oosterwijk, water specialist at Priva. "Water is a carrier for viruses, bacteria, and fungi. UV-C disinfection is an effective way to address these pathogens."

The power of UV-C in water treatment
UV-C technology uses high-energy ultraviolet radiation to neutralize microorganisms in water. This means that bacteria, fungi, and viruses are inactivated without the use of chemicals. In addition to its broad-spectrum effectiveness against pathogens, UV-C has been shown to be effective against specific plant viruses, such as Tomato Brown Rugose Fruit Virus (ToBRFV).

© Priva

Preventing the spread of ToBRFV through water
ToBRFV is a serious global threat to tomato cultivation. This persistent virus is highly contagious and can spread easily through hands, clothing, tools, or mobile phones. What is less widely known is that contaminated irrigation water can also be a source of infection.

A research trial conducted by Normec Groen Agro Control shows that UV-C disinfection is an effective method to help prevent the spread of ToBRFV through recirculated drain water.

"The recommended standard dose of UV-C is 250 mJ/cm², which has also been shown to be effective against other plant pathogens," explains Ruben. "Our Vialux M-Line UV-C disinfection unit not only meets this standard but is also backed by over 25 years of proven experience in drain water disinfection."

Why UV-C Is a valuable solution for growers
An increasing number of growers are discovering the benefits of UV-C disinfection. Not only does it eliminate harmful microorganisms, but it also offers other benefits such as sustainable water use, is easy to integrate, and complies with environmental regulations.

"Investing in UV-C is investing in a sustainable future," concludes Ruben. "Not only do you save on water and fertilizer, but you also reduce the risk of disease and improve crop quality. With a solution like the Priva Vialux-Line, growers can reliably disinfect and reuse their water with ease".