Acetamiprid-Induced Toxicity Thresholds and Population Sensitivity in <i>Trichogramma dendrolimi</i>: Implications for Pesticide Risk Assessment
<i>Trichogramma dendrolimi</i>, a key egg parasitoid for lepidopteran pest control, faces potential risks from neonicotinoid insecticides like acetamiprid used in integrated pest management (IPM). This study evaluated acetamiprid’s acute and sublethal toxicity to <i>T. dendrolimi&l...
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2025-07-01
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| author | Yan Zhang Jiameng Ren Shenhang Cheng |
| author_facet | Yan Zhang Jiameng Ren Shenhang Cheng |
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| description | <i>Trichogramma dendrolimi</i>, a key egg parasitoid for lepidopteran pest control, faces potential risks from neonicotinoid insecticides like acetamiprid used in integrated pest management (IPM). This study evaluated acetamiprid’s acute and sublethal toxicity to <i>T. dendrolimi</i> and assessed population-level risks via species sensitivity distribution (SSD). Acute toxicity assays using glass-vial residues revealed a 24 h LC<sub>50</sub> of 0.12 mg a.i. L<sup>−1</sup> for adults, three orders of magnitude below the maximum field rate (100 mg a.i. L<sup>−1</sup>). Sublethal exposure (1/2–1/100 LC<sub>50</sub>) significantly reduced parasitism and emergence rates (NOEC = 2.3 μg a.i. L<sup>−1</sup>) but did not affect offspring survival. Acetamiprid also shortened offspring development at 11.5–57.5 μg a.i. L<sup>−1</sup>. SSD analysis identified <i>T. dendrolimi</i> as the most sensitive parasitoid to acetamiprid (HC<sub>5</sub>/HC<sub>50</sub>) = 0.11/5.88 mg a.i. L<sup>−1</sup>), with field rates (30–100 mg a.i. L<sup>−1</sup>) indicating a potentially affected fraction (PAF) of 76.8–97.9%. These findings underscore the need to integrate sublethal effects into pesticide regulations to conserve parasitoid-mediated ecosystem services. |
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| publishDate | 2025-07-01 |
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| series | Insects |
| spelling | doaj-art-e9deee93c1c54deebe9d06be09b6fb5a2025-07-25T13:25:38ZengMDPI AGInsects2075-44502025-07-0116769810.3390/insects16070698Acetamiprid-Induced Toxicity Thresholds and Population Sensitivity in <i>Trichogramma dendrolimi</i>: Implications for Pesticide Risk AssessmentYan Zhang0Jiameng Ren1Shenhang Cheng2Department of Biological Science and Technology, Jinzhong University, Jinzhong 030619, ChinaDepartment of Biological Science and Technology, Jinzhong University, Jinzhong 030619, ChinaSchool of Synthetic Biology, Shanxi University, Taiyuan 030006, China<i>Trichogramma dendrolimi</i>, a key egg parasitoid for lepidopteran pest control, faces potential risks from neonicotinoid insecticides like acetamiprid used in integrated pest management (IPM). This study evaluated acetamiprid’s acute and sublethal toxicity to <i>T. dendrolimi</i> and assessed population-level risks via species sensitivity distribution (SSD). Acute toxicity assays using glass-vial residues revealed a 24 h LC<sub>50</sub> of 0.12 mg a.i. L<sup>−1</sup> for adults, three orders of magnitude below the maximum field rate (100 mg a.i. L<sup>−1</sup>). Sublethal exposure (1/2–1/100 LC<sub>50</sub>) significantly reduced parasitism and emergence rates (NOEC = 2.3 μg a.i. L<sup>−1</sup>) but did not affect offspring survival. Acetamiprid also shortened offspring development at 11.5–57.5 μg a.i. L<sup>−1</sup>. SSD analysis identified <i>T. dendrolimi</i> as the most sensitive parasitoid to acetamiprid (HC<sub>5</sub>/HC<sub>50</sub>) = 0.11/5.88 mg a.i. L<sup>−1</sup>), with field rates (30–100 mg a.i. L<sup>−1</sup>) indicating a potentially affected fraction (PAF) of 76.8–97.9%. These findings underscore the need to integrate sublethal effects into pesticide regulations to conserve parasitoid-mediated ecosystem services.https://www.mdpi.com/2075-4450/16/7/698ecotoxicologyacetamipridrisk assessmentsublethal effectsspecies sensitivity distribution |
| spellingShingle | Yan Zhang Jiameng Ren Shenhang Cheng Acetamiprid-Induced Toxicity Thresholds and Population Sensitivity in <i>Trichogramma dendrolimi</i>: Implications for Pesticide Risk Assessment Insects ecotoxicology acetamiprid risk assessment sublethal effects species sensitivity distribution |
| title | Acetamiprid-Induced Toxicity Thresholds and Population Sensitivity in <i>Trichogramma dendrolimi</i>: Implications for Pesticide Risk Assessment |
| title_full | Acetamiprid-Induced Toxicity Thresholds and Population Sensitivity in <i>Trichogramma dendrolimi</i>: Implications for Pesticide Risk Assessment |
| title_fullStr | Acetamiprid-Induced Toxicity Thresholds and Population Sensitivity in <i>Trichogramma dendrolimi</i>: Implications for Pesticide Risk Assessment |
| title_full_unstemmed | Acetamiprid-Induced Toxicity Thresholds and Population Sensitivity in <i>Trichogramma dendrolimi</i>: Implications for Pesticide Risk Assessment |
| title_short | Acetamiprid-Induced Toxicity Thresholds and Population Sensitivity in <i>Trichogramma dendrolimi</i>: Implications for Pesticide Risk Assessment |
| title_sort | acetamiprid induced toxicity thresholds and population sensitivity in i trichogramma dendrolimi i implications for pesticide risk assessment |
| topic | ecotoxicology acetamiprid risk assessment sublethal effects species sensitivity distribution |
| url | https://www.mdpi.com/2075-4450/16/7/698 |
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