PROBLEM TO BE SOLVED: To provide a light beam based method of controlling fusarium disease in which a plant is irradiated with monochromatic or compound light at night or in darkness to increase the phenolic material content in leaf bodies of the plant.SOLUTION: In a method based on a beam to fusarium disease control, a device having a monochromatic beam or compound beam of blue, green, yellow and red light of LEDs is used to irradiate a plant with the monochromatic beam or the compound beam at night or in darkness to increase the phenol content in leaf bodies of the plant.COPYRIGHT: (C)2016,JPO&INPIT【課題】単独光、複合光を夜間又は暗黒時に植物に照射し植物の葉体内にフェノール物質の含有量を増加させ、フザリウム病の防除の光線利用方法を提供する。【解決手段】LEDの青色光、緑色光、黄色光、赤色光の単独光又は、複合光線を有する装置にて、夜間または、暗黒時に当該単独光又は、当該複合光線を植物に照射し、当該植物の葉体内にフェノール含有量を増加させる、フザリウム病防除の光線利用方法。【選択図】図4
