We have carried out non-relativistic calculations to investigate the effect of Debye plasmas screening on the doubly excited nonautoionizing 1,3 P e and 1,3 D o states of Li II, Be III, B IV, and C V using highly correlated exponential wave functions within the framework of Ritz variational principle. The 2p 2 3 P e , 2p3p 1 P e , and 2p3d 1,3 D o states energies, and wavelengths for the 2p3p 1 P e ! 2p3d 1 D o , 2p 2 3 P e ! 2p3d 3 D o , 2p3p 3 P e ! 2p3d 3 D o , and 2p3p 3 P e ! 2p3d 3 D o transitions for different Debye lengths are reported. Comparisons are made with the existing results. Results for B IV and C V for different screening parameters are reported for the first time in the literature. Transition wavelengths show interesting behavior with increasing screening parameters and nuclear charge. V C 2012 American Institute of Physics. [http://dx.