This papar deals with performances of laboratory populations of green peach aphid,Myzus persicae(S>ulzer),living on the rape leaves fumigated with SO₂ doses ranging from 40 ppb to 160 ppb. The trend indexes of population, the net reproduction rates(R_ō), and the innate capacities for increase(r_m), of the aphids fed on the rape leaves exposed to SO₂ concentrations of 40 ppb and 80 ppb increased by 39.2,%, 91.0%; 35.5%, 83.9% and 11.9%, 10.5%, res- pectively, compared to those of the insects on the control lea...