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Abstract
Cabbage (Brassica oleracea var.capitata) is one of the famous vegetables which is also cultivated in Afghanistan. Many pests have attacked the cabbage plant, of which the cabbage aphid is the most famous and causes huge damage. The cabbage aphid that feeds on the cell saps of the cabbage, causes twisting, swelling, burns and crookedness in the cabbage and most of the time it causes the death of plant. Based on this principle, a decision was made to carry out a research entitled (Comparative efficacy of different chemical and botanical insecticides for management of cabbage aphid (Brevicoryne brassicae). The aforementioned research was carried out in the research farm of the Faculty of Agriculture of Kabul University in the form of a randomized completely block design(RCBD), which included three replications and six treatments, included treatments of chemicals (Cypermethrin, Confidor and Sevin), botanical insecticides (neem powder, tobacco decoction) and control. The results of statistical analysis by using Statistix 9 software showed that, there was no significant difference between replications but there was significant difference between treatments. Statistical analysis revealed that Confidor insecticide had the greatest effect, followed by Cypermethrin and Sevin, respectively, which played an important role in reducing the cabbage aphids. In the same way, powdered neem and tobacco decoction had the least effect on the mortality of cabbage aphids.