Assessment of the risk of imidaclothiz to the dominant aphid parasitoid Binodoxys communis (Hymenoptera: Braconidae)

• Published in: Environmental research Vol. 238; p. 117165
• Main Authors: Du, Lingen, Gao, Xueke, Zhao, Likang, Zhu, Xiangzhen, Wang, Li, Zhang, Kaixin, Li, Dongyang, Ji, Jichao, Luo, Junyu, Cui, Jinjie
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.12.2023
• Subjects: 16S rRNA; Binodoxys communis; Imidaclothiz; Sublethal concentration; Transcriptome; 16S rRNA; Imidaclothiz; Binodoxys communis; Sublethal concentration; Transcriptome
• ISSN: 0013-9351; 1096-0953
• DOI: 10.1016/j.envres.2023.117165

The neonicotinoid of imidaclothiz insecticide with low resistance and high efficiency, has great potential for application in pest control in specifically cotton field. In this systematically evaluate the effects of sublethal doses of imidaclothiz (LC10: 11.48 mg/L; LC30: 28.03 mg/L) on the biology, transcriptome, and microbiome of Binodoxys communis, the predominant primary parasitic natural enemy of aphids. The findings indicated that imidaclothiz has significant deleterious effects on the survival rate, parasitic rate, and survival time of B. communis. Additionally, there was a marked reduction in the survival rate and survival time of the F1 generation, that is, the negative effect of imidaclothiz on B. communis was continuous and trans-generational. Transcriptome analysis revealed that imidaclothiz treatment elicited alterations in the expression of genes associated with energy and detoxification metabolism. In addition, 16S rRNA analysis revealed a significant increase in the relative abundance of Rhodococcus and Pantoea, which are associated with detoxification metabolism, due to imidaclothiz exposure. These findings provide evidence that B. communis may regulate gene expression in conjunction with symbiotic bacteria to enhance adaptation to imidaclothiz. Finally, this study precise evaluation of imidaclothiz's potential risk to B. communis and provides crucial theoretical support for increasing the assessment of imidaclothiz in integrated pest management. •Imidaclothiz (Im) had a significant adverse effect on the growth and reproduction of B. communis.•Im induced the negative effects of B. communis that existed across generations.•Pathway of PPAR and detoxification metabolic were significantly influenced by Im.•Im induced the increase of Rhodococcus genus abundance.•Symbiotic bacteria coordinate gene expression to increase B. communis adaptability to Im.