The present invention relates to a method for physical plant treatment by means of electrostatic charge, wherein a transfer of the electrostatic charge takes place via water treated by way of an influence process, wherein the water comprises water clusters having an electron deficit due to the treatment by means of an influence process, wherein the water treated by means of an influence process can be obtained by the following process steps: Introducing the water to be treated into a galvanic element, Aligning the charges and free electrons in the electric field, Separating the charges by motion and by the influence resulting therefrom and Collecting and discharging the de-electronized positively-charged fraction. The method for physical plant treatment allows comprehensive and effective control of fungal diseases, simultaneously avoiding toxicological impact on the environment.