PROBLEM TO BE SOLVED: To provide a new method for preventing weeds more effectively than herbicides and mowing, and a device for the same.;SOLUTION: By radiating an artificial ultraviolet light on the weeds, the weeds are withered or the growth of the weeds is suppressed. Especially, the simultaneous use of the radiation of the artificial ultraviolet light with the application of the herbicides is preferable. In the case of radiating the artificial ultraviolet light on useful vegetables such as crops, fruit trees, flower trees, lawn grass, etc., it is preferable to control the wave length, irradiation intensity and irradiation time of the artificial ultraviolet light to conditions of not inhibiting the growth of such the useful vegetables, blocking the useful vegetables from the radiation of the ultraviolet light or changing the irradiating direction of the artificial ultraviolet light so as not to irradiate the useful vegetable zone. The device for preventing the weeds is equipped with the ultraviolet light-radiating device 13 for withering the weeds or controlling the growth of the weeds, and such the ultraviolet light-radiating device 13 is installed at the weeds-preventing positions such as a tractor, road side belt, pipeline 11, highly elevated stand, steel tower stand, etc.;COPYRIGHT: (C)2012,JPO&INPIT
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