Mechanisms underlying the effects of low concentrations of chlorantraniliprole on development and reproduction of the fall armyworm, Spodoptera frugiperda

  • Pestic Biochem Physiol. 2023 Apr:191:105362. doi: 10.1016/j.pestbp.2023.105362.
Jie Yang  1 ,  Daojie Guan  1 ,  Jiaping Wei  1 ,  Huichen Ge  1 ,  Xiaoli Cao  1 ,  Susu Lv  1 ,  Xiaoyang Zhou  1 ,  Yang Zheng  1 ,  Xiangkun Meng  1 ,  Jianjun Wang  1 ,  Kun Qian  2
Affiliations
  • 1. College of Plant Protection, Yangzhou University, Yangzhou 225009, China.
  • 2. College of Plant Protection, Yangzhou University, Yangzhou 225009, China; Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education, Yangzhou University, Yangzhou 225009, China. Electronic address: [email protected].
PMID: 36963952 DOI: 10.1016/j.pestbp.2023.105362
Abstract

It is well known that sublethal dose of insecticides induces life history trait changes of both target and non-target insect species, however, the underlying mechanisms remain not well understood. In this study, the effects of low concentrations of the anthranilic diamide Insecticide chlorantraniliprole on the development and reproduction of the fall armyworm (FAW), Spodoptera frugiperda, were evaluated, and the underlying mechanisms were explored. The results showed that exposure of FAW to LC10 and LC30 chlorantraniliprole prolonged the larvae duration, decreased the mean weight of the larvae and pupae, and lowered the pupation rate as well as emergence rate. The fecundity of female adults was also negatively affected by treatment with low concentrations of chlorantraniliprole. Consistently, we found that exposure of FAW to LC30 chlorantraniliprole downregulated the mRNA expression of juvenile hormone (JH) esterase (SfJHE), leading to the increase of JH titer in larvae. We also found that treatment with low concentrations of chlorantraniliprole suppressed the expression of ribosomal protein S6 kinase1 (SfS6K1) in female adults, resulting in the downregulation of the gene encoding vitellogenin (SfVg). These results provided insights into the mechanisms underlying the effects of low concentrations of insecticides on insect pests, and had applied implications for the control of FAW.

Keywords
Chlorantraniliprole; Juvenile hormone esterase; Ribosomal protein S6 kinase; Spodoptera frugiperda; Sublethal effects; Vitellogenin.
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