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

Yokoyama, Atsushi; Ohtsu, Kazuhisa; Iwafune, Takashi; Nagai, Takashi; Ishihara, Satoru; Kobara, Yuso; Horio, Takeshi; Endo, Shozo

doi:10.1584/jpestics.g08-26

Cited by 18 publications

(19 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…e EC 50 value for D. magna (190 µg/L) 1) was 1,200 times higher than that for the most sensitive aquatic insect, Cheumatopsyche brevilineata (0.153 µg/L). 23) e SSD of imidacloprid and pronil showed a clear separation between arthropods and others (Fig. 2).…”

Section: E Ect Analysismentioning

confidence: 93%

See 1 more Smart Citation

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

Nagai

Yokoyama

2012

J. Pestic. Sci.

Self Cite

View full text Add to dashboard Cite

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...

show abstract

Section: E Ect Analysismentioning

confidence: 93%

“…erefore, using the toxicity data on only the three standard species would lead to an underestimation of ecological risk. Toxicity testing using aquatic insects, such as the caddis y 23) is essential for assessing these types of insecticides.…”

Section: Ecological Relevance Of Potentially a Ected Fractionmentioning

confidence: 99%

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

Nagai

Yokoyama

2012

J. Pestic. Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

“…18) The acute toxicity data (LC 50 and EC 50 ) of clothianidin obtained for other aquatic organisms comprise 3 crustaceans, Procambarus clarkii, 25) Hyalella azteca, and Paratya compressa improvisa, 26) 3 fish, Cyprinus carpio, Lepomis macrochirus, and Oncorhynchus mykiss, 14) and 2 insects, Cheumatopsyche brevilineatus 27) and Chironomus riparius. 28) Acute toxicity data for imidacloprid to other aquatic vertebrates and invertebrates, including amphibians, crustaceans, fish, insects, and worms, were obtained from the ECOTOX database (http://cfpub.epa.gov/ecotox/) as reported in Hayasaka et al 18) Then, based on the degree of discrepancies in the HC5 values between the two species groups, we evaluated the differences in acute toxicity between the old (imidacloprid) 18) and new (clothianidin) neonicotinoid insecticides to aquatic organisms.…”

Section: Discussionmentioning

confidence: 99%

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

et al. 2013

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…We maintained both strains in separate rooms (20°C, a photoperiod of 18-hr light : 6-hr dark) according to the method of Yokoyama et al 13) as follows. Briefly, larvae were kept in an acrylic rearing container in which the water was continuously stirred by a magnetic stirrer and aerated.…”

Section: Test Organism and Rearing Conditionsmentioning

confidence: 99%

“…Acute toxicity tests using first-instar larvae less than 24 hr old were conducted by the method of Yokoyama et al 13) Polystyrene 48-well dishes were used as test vessels. First-instar larvae were placed individually in each well containing test solution.…”

Section: Acute Toxicity Testsmentioning

confidence: 99%

Sensitivity difference to insecticides of a riverine caddisfly, Cheumatopsyche brevilineata (Trichoptera: Hydropsychidae), depending on the larval stages and strains

et al. 2009

Self Cite

View full text Add to dashboard Cite

To determine sensitivity to fenitrothion (MEP), fenobucarb (BPMC) and imidacloprid (IMI) in each larval instar of Cheumatopsyche brevilineata, we carried out 48-hr acute toxicity tests using strains M and K originating from an urban river and an irrigation canal, respectively. First instar was the most sensitive stage to all three insecticides whereas fifth instar was the most insensitive in both strains. Larvae of strain K were significantly more insensitive to MEP through larval growth and to BPMC in second or later instars than larvae of strain M; however, sensitivity to IMI did not differ significantly between strains.

show abstract

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

Cited by 18 publications

References 22 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

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

Sensitivity difference to insecticides of a riverine caddisfly, Cheumatopsyche brevilineata (Trichoptera: Hydropsychidae), depending on the larval stages and strains

Contact Info

Product

Resources

About