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Updated: Jan 28, 2026
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Screening for Endocrine Activity in Water Using Commercially-available In Vitro Transactivation Bioassays
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In Vitro Fungicidal Activity of Acidic Electrolyzed Oxidizing Water
J W Buck1, M W van Iersel2, R D Oetting3
1Department of Plant Pathology.
Plant Disease
|March 2, 2019
Summary
Acidic electrolyzed oxidizing (EO) water effectively inactivates a broad spectrum of fungi, showing potential for greenhouse disease control. This nonthermal method also proved safe for plant tissues and inhibited disease development post-inoculation.
Area of Science:
- Agricultural Science
- Plant Pathology
- Microbiology
Background:
- Acidic electrolyzed oxidizing (EO) water is a nonthermal method gaining traction for microbial inactivation in food processing.
- Its potential for controlling plant foliar diseases in greenhouse environments remains largely unexplored.
Purpose of the Study:
- To evaluate the efficacy of acidic EO water against a diverse range of fungal plant pathogens.
- To determine the optimal conditions and limitations for EO water's fungicidal activity.
- To assess the phytotoxicity and therapeutic potential of EO water on geraniums.
Main Methods:
- Fungal species were exposed to acidic EO water (1:9 ratio) for varying durations, followed by neutralization and germination assessment.
- The impact of EO water dilution and the presence of surfactants (Triton X-100, Tween 20) on fungicidal activity was investigated.
- Phytotoxicity was evaluated on geranium leaf tissue, and lesion development of Botrytis cinerea was monitored post-application.
Main Results:
- EO water significantly inhibited or prevented germination in all 22 tested fungal species.
- Thin-walled fungi were inactivated within 30 seconds, while thicker-walled fungi required longer exposure (≥2 minutes).
- EO water efficacy decreased with dilution and was negated by surfactants; however, it showed no phytotoxicity and inhibited post-inoculation disease spread.
Conclusions:
- Acidic EO water exhibits broad-spectrum fungicidal activity against plant pathogens.
- It holds promise as a contact fungicide for aerial plant surfaces and for greenhouse sanitation.
- Further research into optimal application methods and formulations is warranted.
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