PROBLEM TO BE SOLVED: To provide a controlling technique which exhibits a high controlling effect while reducing a load to the environment in the nutriculture plants, and is effective for the wide objects to be controlled (such as plant diseases and insect pests).SOLUTION: A plant is irradiated only with a beam in a wavelength region of 400 to 750 nm or a beam in which the light illuminance of the same wavelength region is made higher than the light illuminance of the other wavelength region, and also, the plant is cultured with a nutrient solution admixed with nonpathogenic microorganisms having a disease controlling effect and/or insect pest controlling effect for plants, thus various plant diseases and/or insect pests or the like are effectively controlled.COPYRIGHT: (C)2013,JPO&INPIT【課題】植物の養液栽培において、環境への負荷を軽減しながら高い防除効果を発揮し、幅広い防除対象(植物病害、害虫など)に有効な防除技術を提供する。【解決手段】400~750nmの波長域の光線のみ又は該波長域の光照度をこれ以外の波長域の光照度より強くした光線を植物に照射し、且つ、植物の病害防除効果及び/又は害虫防除効果を有する非病原性の微生物を添加した養液で植物を栽培することで、各種植物病害及び/又は害虫等を効果的に防除する。【選択図】なし
