Abstract: The invention relates to a method for treating plants, comprising: (S100) connecting a first, in particular substantially stationarily arranged applicator, which has a first polarity, a second, in particular substantially stationarily arranged applicator, which has a second polarity, and a third, in particular substantially stationarily arranged applicator, which has the first polarity, of at least one applicator unit to a controlled constant-power source, (S200) bringing the first applicator and the second applicator into contact with a plant stem and/or leaves of a plant, and the second applicator and the third applicator into contact with the plant stem and/or the leaves of the plant, in succession and/or at the same time, in particular without the applicators making contact with the ground, (S300) applying electrical direct current to the contacted plant stem and/or the leaves of the plant, and (S400) maintaining a substantially constant electrical power by using the controlled constant-power source.

Abstract: In a method, during weed eradication on ground areas using high voltage and, if necessary, additional technology, data regarding the weed growth are repeatedly captured and, using a computer, a forecast concerning the weed growth is computed, and from this at least one parameter for a subsequent treatment is computed and used to optimize the treatment.

Abstract: In a device and method for introducing high voltage into a substrate containing biological material, an applicator module having two or more applicators with simultaneously differently polarized applicators is used, through which the electrical high voltage is delivered in metered quantities to change the substrate. Different variants make it possible to introduce the high voltage into the substrate in controlled manner and selectively.

Abstract: The invention relates to an applicator, in particular a brush for the electrocution, wherein the applicator is rotationally mounted and the brush has conductive and non-conductive bristles.

Abstract: A device for killing or weakening plants and other organisms, has a conveying device for moving the device, a high voltage source and an applicator which is electrically connected to a high voltage source and which has a sensor-guided height-adjusting device. The invention also relates to a method for using the device.