Abstract: Electrical apparatus to kill a plant or at least attenuate plant growth, the apparatus comprising: an electrical energy supply unit; an applicator unit comprising an applicator electrode; a return unit comprising a return electrode; electrical circuitry; the electrical energy supply unit arranged to apply electrical energy through a transmission circuit comprising the applicator electrode, and the return electrode, wherein the electrical circuitry arranged to control an electrical impedance of the electrical energy supply unit to control a property of the electrical energy to the electrodes.

Abstract: An electrical apparatus to kill a plant or at least attenuate plant growth, the apparatus comprising: an electrical energy supply unit; an applicator unit comprising an applicator electrode; a return unit comprising a return electrode; electrical circuitry; the electrical energy supply unit arranged to apply electrical energy through a transmission circuit comprising the applicator electrode, and the return electrode, wherein said electrical circuitry implements a plant treatment mode and a detection mode, wherein the electrical circuitry in the detection mode to determine a plant in operative proximity to the transmission circuit, and based on said determination activate the plant treatment mode in which treatment electrical energy, for killing or at least attenuating plant growth, is applied through the transmission circuit.

Abstract: An electrical apparatus to kill a plant or at least attenuate plant growth, the apparatus comprising: an power supply unit; an applicator unit comprising an applicator electrode; an return unit comprising an return electrode; electrical circuitry; the power supply unit arranged to apply electrical energy through a transmission circuit comprising the applicator electrode, and the return electrode, wherein said electrical circuitry implements a detection system to determine a condition of electrical arcing of the electrical energy from one or both of said electrodes, the electrical circuitry arranged to control the electrical energy through the transmission circuit to at least partially reduce the electrical arcing based on said determined condition of electrical arcing.

Abstract: Electrical apparatus to kill a plant or at least attenuate plant growth, the apparatus comprising: an electrical energy supply unit; an applicator unit comprising an applicator electrode; a return unit comprising a return electrode; the electrical energy supply unit arranged to apply electrical energy through a transmission circuit comprising the applicator electrode, a plant, and the return electrode, a Faraday enclosure arranged to block electromagnetic radiation emitted from the electrical energy.

Abstract: An electrical apparatus to kill a plant or at least attenuate plant growth, the apparatus comprising: an electrical energy supply unit; an applicator unit comprising an applicator electrode; a return unit comprising a return electrode; electrical circuitry; the electrical energy supply unit arranged to apply electrical energy through a transmission circuit comprising the applicator electrode, and the return electrode, wherein said electrical circuitry implements a plant treatment mode and a detection mode, wherein the electrical circuitry in the detection mode to determine a plant in operative proximity to the transmission circuit, and based on said determination activate the plant treatment mode in which treatment electrical energy, for killing or at least attenuating plant growth, is applied through the transmission circuit.

Abstract: An electrical apparatus to kill a plant or at least attenuate plant growth, the apparatus comprising: an power supply unit; an applicator unit comprising an applicator electrode; an return unit comprising an return electrode; electrical circuitry; the power supply unit arranged to apply electrical energy through a transmission circuit comprising the applicator electrode, and the return electrode, wherein said electrical circuitry implements a detection system to determine a condition of electrical arcing of the electrical energy from one or both of said electrodes, the electrical circuitry arranged to control the electrical energy through the transmission circuit to at least partially reduce the electrical arcing based on said determined condition of electrical arcing.

Abstract: Electrical apparatus to kill a plant or at least attenuate plant growth, the apparatus comprising: an electrical energy supply unit; an applicator unit comprising an applicator electrode; a return unit comprising a return electrode; electrical circuitry; the electrical energy supply unit arranged to apply electrical energy through a transmission circuit comprising the applicator electrode, and the return electrode, wherein the electrical circuitry arranged to control an electrical impedance of the electrical energy supply unit to control a property of the electrical energy to the electrodes.