2009
DOI: 10.1584/jpestics.g08-26
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A useful new insecticide bioassay using first-instar larvae of a net-spinning caddisfly, Cheumatopsyche brevilineata (Trichoptera: Hydropsychidae)

Abstract: 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 … Show more

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Cited by 18 publications
(19 citation statements)
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“…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
“…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%
“…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%
“…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%
“…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%