Sublethal effects of flonicamid on the population growth of the grain aphid Rhopalosiphum padi (L.) (Hemiptera: Aphididae)

作者：Fan-Bin Kong, Lingling Cui, Yu-Tai Jiang, Yanxing Lv, Renjie Li, Yang Wang, Xinan Li, Baizhong Zhang, Runqiang Liu · 发表于：Bulletin of Entomological Research · 年份：2025 · DOI：10.1017/s0007485325000045 · 被引用次数：4 · 研究领域：Insect-Plant Interactions and Control、Insect Pest Control Strategies、Insect and Pesticide Research

Abstract Rhopalosiphum padi is an important grain pest, causing severe losses during crop production. As a systemic insecticide, flonicamid can control piercing-sucking pests efficiently. In our study, the lethal effects of flonicamid on the biological traits of R. padi were investigated via a life table approach. Flonicamid is highly efficiently toxic to R. padi , with an LC 50 of 9.068 mg L −1 . The adult longevity and fecundity of the R. padi F 0 generation were markedly reduced under the LC 25 and LC 50 concentrations of flonicamid exposure. In addition, negative transgenerational effects on R. padi were observed under exposure to lethal concentrations of flonicamid, with noticeable decreases in the reproductive period, adult longevity, total longevity, and total fecundity of the F 1 generation under the LC 25 concentration of flonicamid. Furthermore, the third nymph stage (N3), preadult stage, duration of the adult pre-reproductive period, duration of the total pre-reproductive period, reproductive period, adult longevity, total longevity, and total fecundity of the F 1 generation were significantly lower under treatment with the LC 50 concentration of flonicamid. The life table parameters were subsequently analysed, revealing that the intrinsic rate of increase ( r m ) and the net reproductive rate ( R 0 ) were significantly lower but that the finite rate of increase ( λ ) and the mean generation time ( T ) were not significantly different under the LC 25 and LC 50 conc...