[en] rf stoppering of a streaming plasma was observed in experiments in which the applied electric fields were too weak for stoppering by the ponderomotive effect on ions. The experimental parameters met two requirements for the electron ponderomotive effect: (a) The electron thermal speed v₀<<ωL, the product of the frequency and scale length of the rf field; and (b) the field amplitude E> or approx. =(2ω/e)[mk(T/sub e/+T/sub i/)]/sup 1/2/. The stoppering observed was the result of the ponderomotive effect on electrons