PROBLEM TO BE SOLVED: To provide a plant disease treating method by which disease damage such as acid burning is not caused on plant leaves in cultivation even if using electrolytic acid water having strong acidity and generated only through diaphragm electrolysis. SOLUTION: The plant disease treating method comprises spraying the electrolytic acidic water having bactericidal capability to plants in cultivation so as to prevent an outbreak of disease on the plants. In the method, the electrolytic acidic water is sprayed to the plants in cultivation followed by sending air to the plants so as to evaporate the electrolytic acidic water adhering to the surfaces of the plant leaves in an early stage, and the electrolytic acidic water employs the electrolytic acidic water having strong acidity, which is produced through diaphragm electrolysis where water or diluted solution of inorganic salt is used as electrolyzed water. COPYRIGHT: (C)2006,JPO&NCIPI
