Action Spectra for Photoperiodic Response in a Diapausing Mosquito
William E. Bradshaw 1
1 Department of Zoology, University of Michigan, Ann Arbor 48104
While 540 nanometers is the most effective wavelength in provoking development, larvae are far more responsive to 540-nanometer light if it is provided immediately preceding rather than followng a white-light photophase which otherwise serves to maintain diapause. This difference in sensitivity is probably due to bleaching and implies that the larvae experience an asymmetric day.