BIBLIOTECA HORTICULTURA

BIBLIOTECA HORTICULTURA

Study supporting the usefulness of electrolysed water in pathogen inactivation

Study supporting the usefulness of electrolysed water in pathogen inactivation

Hussien A. et al., International Citrus Congress 2016

Penicillium species can cause massive losses for high value crop like citrus. Electrolysed water was proposed as alternative treatment to chlorine compounds and fungicides.

The effect of incubating spore suspension of three Penicillium spp. with acidic (acEW) and alkaline alEW) electrolysed water was assessed. The electrolysed water was produced by PE-1 water ionizer machine that use only naturally present salts in tap water and allows the user to choose between different levels of electrolysing. Five titanium-platinum coated plates were used for the electrolysing process and the system had separation barrier between anode and cathode compartments to produce two types of electrolysed water.

acEW and alEW physical/chemical characteristics were measured and studied in relation to inactivation of three Penicillium spp. units.

Results revealed weak correlation between free chlorine, Oxidation/Reduction Potential and pH against the strength of sanitisation tested as colony forming units. Using the higher levels in acEW and alEW showed the strongest biocidal effect on Penicillium spp. When using the optimum level of electrolysing, alEW achieved higher inhibition for P. digitatum, P. italicum and P. ulaiense, respectively. The results support the usefulness of electrolysed water in pathogen inactivation, but using amended salt solutions would improve the biocidal effect of electrolysing (See, below, "Effectiveness of electrolysed water to sanitise citrus fruits - the salt matters").

Financial support: STDF and Egypt (grant no. 5555).


Original title and complete list of authors

PRELIMINARY INVESTIGATION OF ALKALINE AND ACIDIC ELECTROLYSED WATER TO CONTROL PENICILLIUM SPECIES OF CITRUS
Hussien A1, Al-Essawy A2, Abo Rehab MEA2 & Youssef K2
1Central Administration of Plant Quarantine, Ministry of Agriculture and Land Reclamation, Dokki, Egypt;
2Agricultural Research Center, Plant Pathology Research Institute, Giza, Egypt; e-mail: youssefeladawy@arc.sci.eg 
International Citrus Congress 2016

Picture by Good Fruit Grower