Effects of Moonlight on Flower Induction in Pharbitis nil, Using a Single Dark Period

Flowering of Pharbitis nil plants was slightly inhibited byexposure to the light of the full moon for 8 or more hours witha single dark period of 16, 14 or 13 h. It is suggested thatin the natural environment moonlight may have at most only aslight delaying effect on the time of flower induction in short-dayplants. Flowering, moonlight, night-break, Pharbitis nil, photoperiodism, short day plants