We examine the effects on energy spectra of weak Langmuir turbulence when we include a nonlinear damping due to the perturbation of electron orbits. The physical mechanism under consideration is usually known as a ''resonance broadening'' effect. Our calculations show that the inclusion of this additional damping reduces the number of cascades predicted from weak turbulence theory for waves detectable with the EISCAT UHF (933 MHz) radar in Tromso, Norway, during RF modification of the ionospheric plasma. ¿American Geophysical Union 1990