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Sublethal acetamiprid affects reproduction, development and disrupts gene expression in Binodoxys communis
Likang Zhao1,2, Hui Xue1,2, Punniyakotti Elumalai1,2
1Zhengzhou Research Base, State Key Laboratory of Cotton Bio-breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, Henan, China.
Environmental Science and Pollution Research International
|April 24, 2024
Summary
Acetamiprid (ACE) negatively impacts the survival, longevity, and reproduction of the parasitic wasp Binodoxys communis across generations. This neonicotinoid insecticide may reduce the biological control capacity of this important natural enemy.
Area of Science:
- Environmental toxicology
- Insect toxicology
- Chemical ecology
Background:
- Neonicotinoid insecticides are widely used, but their toxicological effects on non-target arthropods, particularly beneficial insects, require further investigation.
- Binodoxys communis is a crucial parasitoid for controlling aphid pests, making its sensitivity to pesticides a significant concern for integrated pest management.
Purpose of the Study:
- To evaluate the lethal and sublethal toxicity of acetamiprid (ACE) on the parasitoid wasp Binodoxys communis.
- To assess the intergenerational effects of ACE exposure on the F1 generation of B. communis.
- To elucidate the molecular mechanisms underlying ACE toxicity in B. communis through transcriptomic analysis.
Main Methods:
- Exposure of adult B. communis (F0 generation) to a range of sublethal acetamiprid concentrations.
- Assessment of key biological parameters including survival rate, adult longevity, parasitism rate, and emergence rate.
- Transcriptomic analysis (RNA sequencing) to identify differentially expressed genes and enriched metabolic pathways.
Main Results:
- Acetamiprid exhibited significant lethal and sublethal toxicity, reducing survival, longevity, parasitism, and emergence rates, while prolonging the developmental cycle.
- Intergenerational toxic effects were observed, with some biological indices in the F1 generation negatively impacted by parental exposure to ACE.
- Transcriptomic analysis revealed significant alterations in gene expression related to amino acid metabolism, energy metabolism, and detoxification pathways.
Conclusions:
- Acetamiprid demonstrates strong contact toxicity to Binodoxys communis, potentially compromising its efficacy as a biological control agent.
- The study highlights the importance of considering intergenerational effects and molecular responses when assessing insecticide risks to beneficial arthropods.
- Findings contribute to a better understanding of the toxicological mechanisms of parasitic natural enemies exposed to insecticides, informing risk assessment and sustainable pest management strategies.
