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Cabbage aphid is attacks plants in the family Brassicaceae (Cruciferae), which includes such important crops such as oilseed rape, Brassica napus L., mustard, Sinapis (Brassica) alba (L.) and nigra (L.) and cabbage vegetables. Field experiments were conducted at Alamata Agricultural Research Center (AARC) during 2019 cropping season to evaluate and verification of insecticide on Cabbage aphid insects, and the corresponding yield of cabbage. The treatments (three insecticide treatments, including unsprayed plots as a control) were laid out in factorial arrangement in RCBD with three replications. The efficacy of Candidate and standard check were recorded 68.12% and 65.21%, respectively. Insecticide treatments significantly reduced the infestation of the insects. The lowest insect population and incidence values of 81.27% and 66.05% and 8.33% and 3.33% were recorded, when treated with lmida-win and Con-Fidence respectively. Candidate (lmida-win) and standard check (Con-Fidence) reduced cabbage aphid population by 94.6% and 91.2%, as compared to unsprayed plot. In conclusion, the results of the present studies revealed that lmida-win foliar spray was effective in reducing cabbage aphid infestation and increased yield. However, more extensive studies are recommended for developing better management of cabbage aphid through integration of insecticide spray schedules and cultivars to enhance sustainable cabbage production in Ethiopia.