Research results in a nutshell
Professor emeritus Risto Tahvonen from LUKE Piikkiö research station is responsible for research plans, guidance and reporting.
The method is a pioneering, research-based innovation which, when used correctly, can replace and reduce the need for chemical pesticides.
- Eradicate diseases spreading on irrigation and recycled waters
- Eradicate fungal spores on surfaces of plant leaves (both pathogenic and non-pathogenic)
- Vegetable mite and possibly also thrips can be wiped out. Studies for exposing other pests and biological control organisms to ozone water are ongoing
- There is no effect on bumblebees
Dry fungus spore sensitive to ozone
It is important to disinfect fungi at the right time. Fungi affecting above-ground parts of plants (for example Borytis spp. and Alternaria spp. ) should be disinfected before infection, when spores are dry. In nature, gray mold persists on the surfaces of dead plants. In humid conditions, they form spores in conidiophores. After drying, the spores detach and spread with the wind.
Water treatment on the left and ozone treatment on the right
Fusarium and pythium diseases in growing medium and irrigation water
Multiple fungi, which spread by growing medium and irrigation water, are damaging roots, stems and vascular bundles of stems. Most well-known and important fungi are Fusarium oxysporum and Pythium ultimum. After cultivation there will remain contagious mycelium and spores on the structures of the greenhouse.
Treating of dry surfaces with ozone water immediately kills these diseases and the space can be taken for cultivation without any waiting period.
Pythium spp. spread easily with irrigation and recycled water to healthy plants by bacteria-sized zoospores. Fungus produces zoospores continuously in roots of plants to soil water and recycled water allowing the disease to spread from a few infected plants to whole plantation. Disease is noticeable as damping-off and rotting roots. To control the Pythium fungus, we have now developed our special techniques for treating greenhouse structures, irrigation pipes and irrigation water.
Water treatment on the left and ozone water on the right
Powdery mildew on cucumber
Powdery mildew creates thin layer of mycelium on infected leaves. Mycelium gets necessary moisture and nutrients with suction mycelium directly through leaves. Mycelium forms white conidia on leaves and conidia are spreading by wind on vast areas infecting healthy plants. Pathogen is an absolute parasite meaning it can success only on leaves alive.
Spores have high water content which allows them to germinate at high humidity. When spores get in contact with water drops, significant amount of spores die in a few minutes. Replacing natural rain at the right moment with ozone water can kill all spores within seconds allows to keep infection and spreading of the disease well under control.
Cucumber treated with water on the left, cucumber sprayed with ozone water on the right
Ozone water penetrates skin of vegetable mite killing it instantly. On the left damages by vegetable mite on bean and on the right similar growth treated with ozone water.
Bean treated with water on the left, bean sprayed with ozone water on the right
Olimme mukana Lepaa 2022 -messuilla 11.–13. 8.2022. Oli mukavaa, että osastollamme kävi paljon messuvieraita, jotka ehtivät pysähtyä hetkeksi juttelemaan kanssamme. – Kiitos kaikille osastollamme vierailleille!