Tarbiat Modares University Journal of Crop Protection 2251-9041 12 4 2023 12 01 Sublethal effects of some biorational pesticides on population growth parameters of cabbage aphid, Brevicoryne brassicae 403 413 1648 10.48311/jcp.2023.1648 EN Sahar Shahmohammadi Department of Biodiversity, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran. Mohammadreza Lashkari Department of Biodiversity, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran. Hadi Zohdi Department of Plant Protection, Kerman Agricultural and Resources Research and Education Center. Kerman, Iran. Nargess Memarizadeh Department of Pesticides Researches, Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran. Mohsen Mehrparvar Department of Biodiversity, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran. Journal Article <span>The cabbage aphid, Brevicoryne brassicae L. (Hemiptera: Aphididae), is an important pest of canola that can considerably limit crop production through direct or indirect damage. In this study, the effects of </span><span>Azadirachtin, Tondexir, Palizin, and Thiamethoxam,</span><span> common insecticides used in managing the cabbage aphid, were investigated on the population growth parameters of this pest. Based on the results, the LC₅₀values for </span><span>Thiamethoxam,</span> <span>Palizin, Azadirachtin, and Tondexir </span><span>were </span><span>0.19</span><span>, 0.63, 1.00, and </span><span>3.82 </span><span>g/L</span><span>,</span><span> respectively. Moreover, LC₃₀concentrations of </span><span>Thiamethoxam,</span> <span>Palizin, Azadirachtin, and Tondexir </span><span>were </span><span>0.11</span><span>,</span><span> 0.10</span><span>, </span><span>0.41</span><span>, and </span><span>1.68 </span><span>g/L, respectively, applied in the sublethal studies. The cabbage aphids reared on the plants treated with these insecticides had lower longevity, fecundity, and reproductive period than the control treatment. The intrinsic rate of increase (r_m), finite rate of increase (λ), net reproductive rate (R₀), and generation time (T) were lower on Thiamethoxam treatment. Tondexir and Palizin treatments had lower values than </span><span>Azadirachtin</span><span>. However, there was no significant difference between the Tondexir and Palizin treatments. The population treated by Azadirachtin had the highest values of growth parameters. According to the results and available information in the context of risk assessment of the studied insecticides, this research recommends the application of Thiamethoxam in the integrated pest management of cabbage aphid.</span><br> https://jcp.modares.ac.ir/article_1648_7437d136770f5b35194cb46c1653efaa.pdf