Influence of light in acute toxicity bioassays of imidacloprid and zinc pyrithione to zooplankton crustaceans

Sánchez‐Bayo, Francisco; Goka, Kouichi

doi:10.1016/j.aquatox.2006.03.009

Cited by 81 publications

(39 citation statements)

References 41 publications

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“…Moreover, the di erence in sensitivity of crustaceans among taxonomic groups was very large (more than 10,000 times). Ostracods were highly sensitive (EC 50 of 1−10 µg/L) to imidacloprid, 22) but Daphnia magna, which is the standard species for the toxicity testing of arthropods, was much less sensitive (EC 50 of >85,000 µg/L). 1) Acute toxicity data on pronil was obtained for 27 genera of freshwater organisms.…”

Section: E Ect Analysismentioning

confidence: 99%

Comparison of ecological risks of insecticides for nursery-box application using species sensitivity distribution

Nagai

Yokoyama

2012

J. Pestic. Sci.

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e ecological risks to aquatic organisms posed by insecticide use were compared using species sensitivity distribution (SSD) to determine if nursery-box application is ecologically safer than surface-water application. e targeted insecticides were imidacloprid and pronil for nursery-box application and fenitrothion as a reference for surface-water application. Ecological risks were quanti ed as the potentially a ected fraction (PAF) of species calculated using SSD and the pesticide concentration in river and paddy water. e PAF value was the highest for fenitrothion in both river and paddy water, indicating that substituting nursery-box for surface-water application reduces the ecological risk. e validity of our SSD approach for risk quanti cation was con rmed with comparisons in mesocosm studies. e comparisons suggest that the PAF values successfully correspond to the magnitude of the pesticide e ect on ecosystems. e actual ecosystem appeared to have strong recovery potential, even when more than 50% of the species were a ected. © Pesticide Science Society of Japan Keywords: risk assessment, imidacloprid, pronil, potentially a ected fraction. Electronic supplementary materiale online version of this article contains supplementary material (Supplemental Tables S1 and S2), which is available at http://www.jstage.jst.go.jp/browse/jpestics/. IntroductionIn Japan, pesticide registration criteria based on ecological risk assessment are set by the Japan's Ministry of Environment under the Pesticide Regulation Law.1) Under the risk assessment scheme, acute toxicity tests are conducted for sh (Cyprinus carpio), daphnids (Daphnia magna), and algae (Pseudokirchneriella subcapitata), and then the acute e ect concentration (AEC) is determined as the minimum value of the 50% e ect concentration (EC 50 ) or 50% lethal concentration (LC 50 ) divided by an uncertainty factor (10 for sh and crustaceans and 1 for algae). Subsequently, the predicted environmental concentration (PEC), which is the peak concentration in river water at the time of pesticide application, is calculated using an environmental model based on a standard scenario in a model basin.2) Finally, if the PEC is less than the AEC, the short-term aquatic risk is deemed to be insigni cant and the pesticide is considered to ful ll the criteria.Various measures are taken by farmers for the protection of biodiversity, such as reducing pesticide use, substituting to safer pesticides, and preventing of pesticide runo into river water.However, the e ciency of the risk management options has not been evaluated. e present risk assessment scheme is deterministic, and therefore does not allow the comparison of risks under the various risk management options. Insecticide application in rice paddy elds in Japan has gradually shi ed from surfacewater application to nursery-box application in light of its many advantages such as reduced labor, long-term e ect, and low runo and dri . However it is necessary to determine if nurserybox application is ecologically safer than surface-w...

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Section: E Ect Analysismentioning

confidence: 99%

Comparison of ecological risks of insecticides for nursery-box application using species sensitivity distribution

Nagai

Yokoyama

2012

J. Pestic. Sci.

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“…The same results have been reported from acute toxicity tests using imidacloprid and four species of crustaceans. 22) The method of bioassay conducted under dark conditions in this study seems to be more useful because it can be applied under various photoperiodic conditions while overcoming the problem of trapping larvae at the water surface. The concentration-response curve for the response of C. brevilineata to fenitrothion was highly reproducible among the six separate experiments.…”

Section: Discussionmentioning

confidence: 99%

“…Boxall et al 40) noted that laboratory bioassays using additional test species can provide important information for constructing species-sensitivity distributions in probabilistic risk assessments, which have drawn increasing attention recently. 41) This new bioassay can be for probabilis- 24) A. aegypti, 24) C. vidua, 22) I. dentifera, 22) C. seurati 22) , C. sphaericus, 22) and Artemia sp. 24) tic risk assessments for lotic ecosystems.…”

Section: Discussionmentioning

confidence: 99%

A useful new insecticide bioassay using first-instar larvae of a net-spinning caddisfly, Cheumatopsyche brevilineata (Trichoptera: Hydropsychidae)

et al. 2009

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A new insecticide bioassay for assessing the effects of acute insecticide toxicity on lotic insects was developed. It uses first-instar larvae of a net-spinning caddisfly, Cheumatopsyche brevilineata. The test method was suitable for 30 insecticides with a range of action mechanisms. Caddisfly larvae were much more sensitive than daphnids to neonicotinoids. The new bioassay is thus a useful and reliable method for assessing the impact of chemicals such as neonicotinoids, whose risks for lotic insects might be underestimated by the daphnid bioassay.

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“…nymphs, crustaceans including ostracods, amphipods, and crayfish, has been reported by many researchers. [41][42][43][44] Since the neonicotinoid chemical class may be safe only to cladocerans, the evaluation of the ecotoxicological risks of the neonicotinoids based on acute toxicity to cladocerans can systematically underestimate the risk of these pesticides to all other aquatic species and communities. Indeed, other scientists have indicated the need for establishing a different risk assessment to this and other classes of systemic insecticides.…”

Section: Differences In Ssd Between Cladocerans and Other Aquatic Or-mentioning

confidence: 99%

Comparison of acute toxicity of two neonicotinoid insecticides, imidacloprid and clothianidin, to five cladoceran species

et al. 2013

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The acute toxicity (48-hr) of old (imidacloprid) and new (clothianidin) neonicotinoid insecticides to five cladoceran species and species sensitivity distribution (SSD) for cladocerans and other aquatic organisms to these insecticides are compared here. The sensitivities to both insecticides were in the following descending order: Ceriodaphnia>Daphnia>Moina. Differences in the 5% hazardous concentration (HC5) threshold between the two species taxa to each compound indicated that clothianidin was 4 times less toxic than imidacloprid only to cladocerans.

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Influence of light in acute toxicity bioassays of imidacloprid and zinc pyrithione to zooplankton crustaceans

Cited by 81 publications

References 41 publications

Comparison of ecological risks of insecticides for nursery-box application using species sensitivity distribution

Comparison of ecological risks of insecticides for nursery-box application using species sensitivity distribution

A useful new insecticide bioassay using first-instar larvae of a net-spinning caddisfly, Cheumatopsyche brevilineata (Trichoptera: Hydropsychidae)

Comparison of acute toxicity of two neonicotinoid insecticides, imidacloprid and clothianidin, to five cladoceran species

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