Rearing immatures of Thyanta calceata in a range of split photophases during each 24 h period and in constant light showed that the adult dimorphic response in color and pu- bescence could be produced; individuals reared in photoperiods in which each scotophase was at least 2 h in length generally developed into the fall/spring morph.
McPherson, J. E.; Vogt, T. E.; and Paskewitz, S. M.
"Effects of Various Split Developmental Photophases and Constant Light During Each 24 Hour Period on Adult Morphology in Thyanta Calceata (Hemiptera: Pentatomidae),"
The Great Lakes Entomologist, vol 16
Available at: https://scholar.valpo.edu/tgle/vol16/iss2/2