FIELD: agricultural pest control. SUBSTANCE: electrodes disposed on the external and internal sides of a tubular glass element are connected to a source of high alternating voltage. The internal electrode is perforated with protruding spikes and/or edges of perforations being directed towards said tubular glass element. The operating device generates ozone which exterminates microorganisms effectively, scares away moth, insects and rodents. EFFECT: perforations reduce substantially the working voltage between electrodes. 8 cl, 2 dwg
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