LIGHTING DEVICE FOR CONTROL OF PLANT DISEASE

摘要

Disclosed is a lighting device (1) for use in the control of a plant disease, which has a light source (2) capable of emitting light containing ultraviolet ray. The light source (2) can emit both of UV-B having a wavelength component with a wavelength of about 280 to 340 nm and UV-C in which a wavelength component with a wavelength of about 255 nm or less is cut off from wavelength components with wavelengths of about 100 to 280 nm to a plant (P) in a superimposed manner. The irradiation of a plant (P) with the UV-C and the UV-B ensures to further inhibit the spore formation or the hypha growth of a filamentous fungus that causes a disease or the like, and to induce a resistance against a disease in the plant (P).