LEDの波長と点滅周期が誘虫量に与える影響
生態系保全の観点から、夜間照明は周辺への影響が少ないものを使用することが望ましい。近年では、誘虫性が低いLEDが多く使用されているが、カゲロウ目などはLEDにも強く誘引されるため、更なる対策が求められる。本稿では、LEDの波長と点滅周期の違いが誘虫量に与える影響について報告する。波長の調整のみでは対策が難しいカゲロウ目に対しては、点滅周期の調整が有効だった。複数の対策方法の組み合わせにより、より広範な昆虫種に対する誘虫量低減効果が期待できる。
Effect on insect attraction by variation of LED wavelengths and flicker frequencies
In terms of ecosystem conservation, it is desirable to use artificial light at night with minimal impact on the surrounding environment. In recent years, LEDs that cause minor attraction of insects have been widely used, but some insects, such as mayflies, are strongly attracted to the LEDs. Therefore, further development of the light with minor effect for insect attraction is required. In this paper, we report the effect on insect attraction by variation of LED wavelengths and flicker frequencies. Effect on mayflies attraction by adjustment of the wavelength was small, whereas adjustment of flicker frequency was effective in decreasing the attraction of mayfly. Combination of various countermeasure methods may provide the decrease of insect attraction in wide variety of insects.