title: Analysis of the Time-Concentration-Mortality Response of Nilaparvata lugens (Hemiptera: Delphacidae) to Paichongding.
abstract: Paichongding is an adicyclicnitromethylene neonicotinoid insecticide with a cis-configuration. Bioassay of paichongding was conducted against Nilaparvata lugens Stål under a laboratory condition. Mortality of N. lugens was analyzed by time-concentration-mortality (TCM) regressions based on the complementary log-log (CLL) model. The conditional mortalities of test individuals increased with the exposure time after treatments with different concentrations, showing that the speed of insecticidal action is concentration dependent. Meanwhile, the conditional mortalities of N. lugens increased as the concentrations of paichongding increased for all developmental stages from instars I-II to macropterous females. Correspondingly, LC(50) and LC90 values to N. lugens gradually decreased with the developmental stages, in which instars I-II were the most sensitive to paichongding, with LC(50) values of 6.31, 0.45, 0.09, and 0.03 mg/liter for 24, 48, 72, and 96 h after treatments, respectively, while macropterous females were the least sensitive among all developmental stages, with LC(50) values of 309.03, 11.48, 1.35, and 0.19 mg/liter at 24, 48, 72, and 96 h after the treatments, respectively. The time-concentration-mortality modeling was mathematically and biologically robust to evaluate the effects of paichongding on N. lugens. The results suggest that paichongding would be an effective alternative pesticide for controlling N. lugens considering its potent effects.
authors.affiliation: Department of Forensic Medicine, Zhongshan School of Medicine, SunYat-Sen University, Guangzhou 510080, China.
authors.forename: Yan-Wei
authors.initials: YW
authors.lastname: Shi
authors.affiliation: State Key Laboratory for Biocontrol & Institute of Entomology, SunYat-Sen University, Guangzhou 510275, China.
authors.forename: Xiaowa
authors.initials: X
authors.lastname: Qin
authors.affiliation: The Key Laboratory of Water and Air Pollution Control of Guangdong Province, South China Institute of Environmental Sciences, MEP, Guangzhou 510065, China.
authors.forename: Zhongyang
authors.initials: Z
authors.lastname: Wang
authors.affiliation: State Key Laboratory for Biocontrol & Institute of Entomology, SunYat-Sen University, Guangzhou 510275, China.
authors.forename: Meng
authors.initials: M
authors.lastname: Wang
authors.affiliation: Tea Research Institute, Yunnan Academy of Agricultural Sciences, Menghai 666201, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Liu
authors.affiliation: Institute of Plant Virology, Fujian Province Key Laboratory of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Chen
authors.affiliation: State Key Laboratory for Biocontrol & Institute of Entomology, SunYat-Sen University, Guangzhou 510275, China.
authors.forename: Runjie
authors.initials: R
authors.lastname: Zhang
authors.affiliation: The Key Laboratory of Water and Air Pollution Control of Guangdong Province, South China Institute of Environmental Sciences, MEP, Guangzhou 510065, China. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. yourtalker@hotmail.com.
authors.forename: Yuedan
authors.initials: Y
authors.lastname: Liu
mesh_terms: D000818:Animals; D053961:Azabicyclo Compounds; D004305:Dose-Response Relationship, Drug; D005260:Female; D006430:Hemiptera / Q000254:growth & development; D007306:Insecticides; D007928:Lethal Dose 50; D008297:Male; D009758:Nymph; D011725:Pyridines; D013997:Time Factors
chemical_list: D053961:Azabicyclo Compounds; D007306:Insecticides; D011725:Pyridines; C588015:paichongding
keywords: complementary log-log model, Nilaparvata lugens, paichongding, pest control, sensitivity