Can chronic exposure to imidacloprid, clothianidin, and thiamethoxam mixtures exert greater than additive toxicity in Chironomus dilutus?

Maloney, Erin M.; Morrissey, Christy A.; Headley, John V.; Peru, Kerry M.; Liber, Karsten

doi:10.1016/j.ecoenv.2018.03.003

Cited by 63 publications

(31 citation statements)

References 31 publications

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“…Their findings were supported by one comparison in Morrissey et al's (2015) review, in which they calculated the geometric mean of all available acute L[E]C50s for aquatic insects and found no difference between imidacloprid and thiamethoxam. However, Morrissey et al (2015) also ranked the available acute toxicity data for C. riparius by comparing the acute LC50 for imidacloprid (20 μg/L; 0.08 μmol/L) with the acute EC50s for clothianidin (22 μg/L; 0.09 μmol/L) and thiamethoxam (35 μg/L; 0.12 μmol/L), a ranking that supports the trends observed for larvae of C. dilutus and mayfly nymphs in the present experiment and several other recent studies (Cavallaro et al 2017;Maloney et al 2018a;Bartlett et al 2018;Raby et al 2018bRaby et al , 2018c. In all these studies, imidacloprid and clothianidin were more toxic than thiamethoxam, with imidacloprid also regularly displaying a higher toxicity than clothianidin.…”

Section: Relative Toxicities Of Neonicotinoidssupporting

confidence: 90%

“…(Foessink et al 2013;Finnegan et al 2017). However, only 4 studies have reported chronic laboratory effects of clothianidin on aquatic insects: the mayfly Neocloeon triangulifer (Raby et al 2018b), C. dilutus (Cavallaro et al 2017;Maloney et al 2018a;and Raby et al 2018b), and C. riparius (unpublished data presented in Morrissey et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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Chronic Toxicities of Neonicotinoids to Nymphs of the Common New Zealand Mayfly Deleatidium spp.

Macaulay

Hageman

Alumbaugh

et al. 2019

Enviro Toxic and Chemistry

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Neonicotinoid insecticides have been shown to have high chronic toxicity relative to acute toxicity, and therefore short‐term toxicity tests ≤96 h in duration may underestimate their environmental risks. Among nontarget aquatic invertebrates, insects of the orders Diptera and Ephemeroptera have been found to be the most sensitive to neonicotinoids. To undertake a more accurate assessment of the risks posed by neonicotinoids to freshwater ecosystems, more data are needed from long‐term tests employing the most sensitive taxa. Using nymphs of the common New Zealand mayfly genus Deleatidium spp., we performed 28‐d static‐renewal exposures with the widely used neonicotinoids imidacloprid, clothianidin, and thiamethoxam. We monitored survival, immobility, impairment, and mayfly moulting propensity at varying time points throughout the experiment. Imidacloprid and clothianidin exerted strong chronic toxicity effects on Deleatidium nymphs, with 28‐d median lethal concentrations (LC50s) of 0.28 and 1.36 µg/L, respectively, whereas thiamethoxam was the least toxic, with a 28‐d LC50 > 4 µg/L (highest concentration tested). Mayfly moulting propensity was also negatively affected by clothianidin (during 3 of 4 wk), imidacloprid (2 of 4 wk), and thiamethoxam (1 of 4 wk). Comparisons with published neonicotinoid chronic toxicity data for other mayfly taxa and larvae of the midge genus Chironomus showed similar sensitivities for mayflies and midges, suggesting that experiments using these taxa provide reliable assessments of the threats of neonicotinoids to the most vulnerable freshwater species. Environ Toxicol Chem 2019;38:2459–2471. © 2019 SETAC

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Section: Relative Toxicities Of Neonicotinoidssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Chronic Toxicities of Neonicotinoids to Nymphs of the Common New Zealand Mayfly Deleatidium spp.

Macaulay

Hageman

Alumbaugh

et al. 2019

Enviro Toxic and Chemistry

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“…33 Chronic exposure to insecticides can have cumulative effects even if an initial effect appears only sublethal. [34][35][36] Cumulative impacts of repeated short-term exposures to LLIN on SPP insects have not been previously investigated.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of long‐lasting insecticide netting on Tribolium castaneum is modulated by multiple exposures, biotic, and abiotic factors

Gerken

Scully

Campbell

et al. 2020

Pest Management Science

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BACKGROUND Prevention is the first line of defense in mitigating losses of post‐harvest crops. Long‐lasting insecticide treated (LLIN) could be used in food facilities to expose insects to insecticide at different areas within a facility. Prior research has shown that single short exposures reduce movement and longer exposures increase mortality for stored‐product insect pests, but we do not know how multiple short duration exposures and biotic and abiotic conditions affect insects exposed to LLIN. Here, we repeatedly exposed red flour beetles, Tribolium castaneum, to LLIN to assess the cumulative effects. We also examined the effects of beetle age and time of day during exposure, and temperature, humidity and food availability during recovery after a single exposure to LLIN. RESULTS We found that four repeated 10‐min exposures had similar knockdown effects as a single 30‐min exposure. We also found that beetles were more affected when aged 1–6 days versus 14–20 days or were exposed at mid‐ or late in the day versus earlier in the day. Higher recovery levels were observed with food and at higher relative humidity. In addition, older beetles were more active than younger beetles during exposure, which could reduce time in contact with netting and partially explain why older beetles tended to be less affected. CONCLUSION Some individuals can recover after exposure to LLIN, dependent on exposure duration and environmental factors, but our study shows that sublethal effects likely persist and future work should consider the physiology of T. castaneum before, during, and after exposure to LLIN. Published 2020. This article is a U.S. Government work and is in the public domain in the USA

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“…The genus Chironomus (Diptera: Chironomidae) is composed of 647 species to date, which are distributed worldwide (Pape & Thompson, ). Many species of this genus have been widely used as test organisms in ecotoxicological assays (Lee & Choi, ; Maloney, Morrissey, Headley, Peru, & Liber, ; Silva et al, ; Watts & Pascoe, ). However, the use of the genus Chironomus in ecological and environmental studies has been hindered by the difficult morphological identification at the species level; therefore, molecular studies are currently quite useful for this genus (Pfenninger, Nowak, Kley, Steinke, & Streit, ; Proulx, Martin, Carew, & Hare, ).…”

Section: Introductionmentioning

confidence: 99%

Histological description of immature Chironomus columbiensis (Diptera: Chironomidae): A potential contribution to environmental monitoring

Campeón‐Morales

Richardi

Rivera‐Páez

2019

Microscopy Res & Technique

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Chironomids have been widely used in environmental monitoring and toxicity assays. Assessment criteria for chironomids range from the molecular‐biochemical level to the population level. However, the use of markers to evaluate cellular and anatomical changes in organs and systems of individuals under contaminant exposure is still incipient. In this study, we conducted a histological description of the main systems and organs of immature Chironomus columbiensis. We used fourth instar larvae, obtained from a standardized culture, and confirmed this state through morphological and molecular methods. Larvae were fixed in Duboscq solution for insects during 48 hr, dehydrated in increasing dilutions of ethanol, and embedded and mounted in historesin to obtain 3 μm sections. The digestive, nervous, excretory, and integumentary systems and the fat body and testicles were analyzed through longitudinal and transversal sections, stained with hematoxylin–eosin (HE), and further photographed and described through light microscopy. This is the first description of internal morphology performed for C. columbiensis and can help in future histopathological analysis, because through bioaccumulation some of these organs are contaminant targets. It can even be a great taxonomic tool, since the characteristics of the histological pattern of C. columbiensis presented differences compared to other descriptions made in chironomids.

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Can chronic exposure to imidacloprid, clothianidin, and thiamethoxam mixtures exert greater than additive toxicity in Chironomus dilutus?

Cited by 63 publications

References 31 publications

Chronic Toxicities of Neonicotinoids to Nymphs of the Common New Zealand Mayfly Deleatidium spp.

Chronic Toxicities of Neonicotinoids to Nymphs of the Common New Zealand Mayfly Deleatidium spp.

Effectiveness of long‐lasting insecticide netting on Tribolium castaneum is modulated by multiple exposures, biotic, and abiotic factors

Histological description of immature Chironomus columbiensis (Diptera: Chironomidae): A potential contribution to environmental monitoring

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