Control of cabbage aphid, Brevicoryne brassicae on oilseed rape using none chemical products in East Azerbaijan province

Botanical pesticides and oils are considered as suitable alternatives to the chemical insecticides in the integrated pest management program due to environmental compatibility, low toxicity to non-target organisms and low environmental stability. In this study, the effects of field concentrations of four botanicals and one biological control agent in the control of cabbage aphid were investigated during two years. The treatments including botanical product PalizinÒ (in two treatments without and with Citra-PlusÒ oil), commercial Neem product (Neem-AzalÒ), DayabonÒ botanical product and a biological product based on Beauveria bassiana, in comparison with the control were used in the stem growth stage of the oilseed rape. The experiment was performed in a randomized complete block design with 6 treatments and 4 replications. The effectiveness of the treatments was evaluated by sampling and comparing the aphid population during 4 times: one day before treatment, 3, 7 and 10 days after treatment. Henderson-Tilton formula was used to calculate the percentage of modified losses. The results of study showed that the treatments of PalizinÒ, PalizinÒ + Citra-PlusÒ oil and DayabonÒ are effective compounds in the control of cabbage aphid and can be considered as a suitable alternative to chemical insecticides in the integrated management program of this pest. Neem-AzalÒ and Naturalis-LÒ products are not effective in controlling cabbage aphid.