PROBLEM TO BE SOLVED: To provide a moth-preventing device and a mosquito-preventing device which eliminate the influence on plant flower bud formation.SOLUTION: A moth-preventing device and a mosquito-preventing device emit green light and yellow green light. A light source of the moth-preventing device is a light emitting device including an LED group having a peak wavelength around 525 nm-530 nm and a light source of the mosquito-preventing device is a light emitting device including an LED group having a peak wavelength 550 nm-555 nm.COPYRIGHT: (C)2014,JPO&INPIT【課題】植物の花芽形成への影響を無くした、防蛾装置、防蚊装置の提供。【解決手段】緑色光と黄緑光を発光する防蛾装置と防蚊装置である。防蛾装置の光源は、ピーク波長525nm~530nm付近となるLED群、防蚊装置の光源は、ピーク波長550nm~555nm付近となるLED群を有する発光装置である。【選択図】図4