Combined ivermectin and spinosad effects on sepsid flies.

IF 2.8 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Environmental Toxicology and Chemistry Pub Date : 2025-08-28 DOI:10.1093/etojnl/vgaf217

Natalia Gourgoulianni, Wolf U Blanckenhorn, Daniel González-Tokman

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引用次数: 0

Abstract

Human-generated pollutants can act in combination to affect the dynamics of non-target beneficial insect populations. Here we simulated a natural scenario by exposing five closely related species of temperate sepsid dung flies (Diptera: Sepsidae) to realistically low concentrations of the parasiticide ivermectin during their larval growth stage, and subsequently to the widely used insecticide spinosad during their adult stage. We evaluated the effects of combined pesticides on several life-history traits associated with organismal fitness. The clearest effect of the combined contaminants across all species was a delay of the egg laying onset, although the most severe effects were observed as dramatic reductions in offspring number in various treatment combinations. As the strongest negative effects of both contaminants in combination were not necessarily at the highest pesticide concentrations, explanations for these non-monotonic dose-responses, including hormesis, are provided. Our results suggest that multiple pesticides released in the environment can interact in different ways to affect insects in agricultural landscapes, with consequences for population dynamics and ecosystem functioning.

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伊维菌素联合spinosad对脓毒蝇的影响。

人为产生的污染物可以共同影响非目标有益昆虫种群的动态。本研究模拟了一种自然环境，将5种亲近性相近的温带脓毒蝇（双翅目：脓毒科）在幼虫生长阶段暴露在低浓度的杀虫伊维菌素中，然后在成虫阶段暴露在广泛使用的杀虫剂spinosad中。我们评估了复合农药对几种与有机体适应性相关的生活史性状的影响。混合污染物对所有物种最明显的影响是延迟产卵开始，尽管观察到最严重的影响是在各种处理组合中后代数量的急剧减少。由于这两种污染物组合的最强负面影响不一定是在最高的农药浓度下，因此提供了这些非单调剂量反应的解释，包括激效。我们的研究结果表明，环境中释放的多种农药可以以不同的方式相互作用，影响农业景观中的昆虫，从而对种群动态和生态系统功能产生影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Environmental Toxicology and Chemistry 环境科学-毒理学

CiteScore

7.40

自引率

9.80%

发文量

265

审稿时长

3.4 months

期刊介绍： The Society of Environmental Toxicology and Chemistry (SETAC) publishes two journals: Environmental Toxicology and Chemistry (ET&C) and Integrated Environmental Assessment and Management (IEAM). Environmental Toxicology and Chemistry is dedicated to furthering scientific knowledge and disseminating information on environmental toxicology and chemistry, including the application of these sciences to risk assessment.[...] Environmental Toxicology and Chemistry is interdisciplinary in scope and integrates the fields of environmental toxicology; environmental, analytical, and molecular chemistry; ecology; physiology; biochemistry; microbiology; genetics; genomics; environmental engineering; chemical, environmental, and biological modeling; epidemiology; and earth sciences. ET&C seeks to publish papers describing original experimental or theoretical work that significantly advances understanding in the area of environmental toxicology, environmental chemistry and hazard/risk assessment. Emphasis is given to papers that enhance capabilities for the prediction, measurement, and assessment of the fate and effects of chemicals in the environment, rather than simply providing additional data. The scientific impact of papers is judged in terms of the breadth and depth of the findings and the expected influence on existing or future scientific practice. Methodological papers must make clear not only how the work differs from existing practice, but the significance of these differences to the field. Site-based research or monitoring must have regional or global implications beyond the particular site, such as evaluating processes, mechanisms, or theory under a natural environmental setting.