Effects of sublethal concentration of nitenpyram on the life history and population dynamics of brown planthopper, Nilaparvata lugens under elevated CO2 levels
Author of the article:ZHOU Hong-Shan, SHANG Fang-Ge, CHEN Liang, ZHAO Mu-Hua, HAO Tao, WU Gang
Author's Workplace:College of Plant Science and Technology, Huazhong Agricultural University
Key Words:Nilaparvata lugens; elevated CO2; nitenpyram; population dynamic; two-sex life table
Abstract:
Abstract [Aim] To investigate the effects of sublethal concentrations of nitenpyram on the individual life history and population parameters of Nilaparvata lugens under elevated CO2, and clarify the biological characteristics of N. lugens to elevated CO2, and thereby provide information relevant to the prevention and control of this pest in the future global warming. [Methods] The effects of a sublethal concentration of nitenpyram LC15 on the life history parameters of the brown planthopper under ambient, and elevated, CO2 concentrations were investigated using a two-sex life table, and the population dynamics of this species was simulated using software. [Results] An LC15 sublethal concentration of nitenpyram significantly prolonged nymph development under both CO2 concentrations (P<0.05), and further extended the average generation history. No significant difference was found between control treatments under both CO2 concentrations (P>0.05). There was no significant difference in egg production under ambient CO2 conditions (P>0.05), but female fecundity increased significantly from 366.5 to 473.4 under elevated CO2 levels (P<0.05). The intrinsic growth rate also increased from 0.187 0 to 0.198 5, and the net reproductive rate increased from 137.4 to 236.7 under elevated CO2 levels. [Conclusion] Brown planthoppers treated with a sublethal concentration of nitenpyram had increased fecundity under an elevated CO2 conditions, which suggests that global warming may make it harder to control of this pest.