Inhibition of Male Diamondback Moth, Plutella xylostella（Lepidoptera: Plutellidae）, Activity under LED Lighting

The activity of male diamondback moths, Plutella xylostella（L.）（Lepidoptera: Plutellidae）, under LED lighting（450, 470, and 525 nm）during the dark phase of a 14L : 10D photoperiod was examined for 5 days. Under the 14L : 10D condition, males showed high activity in the dark phase. However, under 450 and 470 nm LED lighting, the activity was inhibited, as with a 24L : 0D photoperiod. The number of fertilized eggs laid under 450 and 470 nm LED lighting during the dark phase of a 16L : 8D photoperiod was significantly lower than under normal conditions. Furthermore, the lowest percentage of females laying fertilized eggs was observed under 450 and 470 nm LED lighting.