Adsorption of DDT on Suspended Solids in River Water and its Role in Black-fly Control

Fredeen, F. J. H.; Arnason, A. P.; Berck, Ben

doi:10.1038/171700b0

Cited by 26 publications

(14 citation statements)

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“…The introduction of fenvalerate‐spiked sediments into microcosms induced invertebrate drift responses similar to those observed following aquatic insecticide contamination [10]. Similarly, decreases in blackfly larval populations were observed following the introduction of particulate‐associated DDT and temephos [11,12]. Because blackfly larvae feed on particulate matter filtered from the water column, these findings suggest that synthetic pyrethroids might be toxicologically active even when adsorbed to organic matter.…”

Section: Introductionmentioning

confidence: 83%

Effects of dietary esfenvalerate exposures on three aquatic insect species representing different functional feeding groups

Palmquist

Jenkins

Jepson

2008

Enviro Toxic and Chemistry

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Given the chemical properties of synthetic pyrethroids, it is probable that compounds, including esfenvalerate, that enter surface waters may become incorporated into aquatic insect food sources. We examined the effect of dietary esfenvalerate uptake in aquatic insects representing different functional feeding groups. We used three field-collected aquatic insect species: A grazing scraper, Cinygmula reticulata McDunnough (Ephemeroptera: Heptageniidae); an omnivorous filter feeder, Brachycentrus americanus Banks (Trichoptera: Brachycentridae); and a predator, Hesperoperla pacifica Banks (Plecoptera: Perlidae). Laboratory-cultured algae were preexposed for 24 h to esfenvalerate concentrations of 0, 0.025, 0.05, and 0.1 microg/L and provided to two C. reticulata age classes (small and final-instar nymphs). Reduction in small nymph growth was observed following three weeks of feeding on algae exposed to 0.05 and 0.1 microg/L of esfenvalerate, and the highest dietary exposure reduced egg production in final-instar nymphs. The diet for B. americanus and H. pacifica consisted of dead third-instar Chironomus tentans larvae preexposed for 24 h to esfenvalerate concentrations ranging between 0.1 and 1.0 microg/L. Consumption of larvae exposed to 0.5 to 1.0 microg/L of esfenvalerate caused case abandonment and mortality in B. americanus caddisfly larvae. Although H. pacifica nymphs readily consumed esfenvalerate-exposed larvae, no adverse effects were observed during the present study. Furthermore, no evidence of esfenvalerate-induced feeding deterrence was found in any of the species tested, suggesting that aquatic insects may not be able to distinguish between pyrethroid-contaminated and uncontaminated food sources. These findings indicate that feeding deterrence is not a factor in regulating aquatic insect dietary exposures to synthetic pyrethroids.

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Section: Introductionmentioning

confidence: 83%

Effects of dietary esfenvalerate exposures on three aquatic insect species representing different functional feeding groups

Palmquist

Jenkins

Jepson

2008

Enviro Toxic and Chemistry

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“…Fredeen, Arnason & Berck (1953) showed that clay and fine silt in the Saskatchewan River was very effective in adsorbing DDT from the river water. Fredeen, Arnason & Berck (1953) showed that clay and fine silt in the Saskatchewan River was very effective in adsorbing DDT from the river water.…”

Section: The Bottom Soils and Siltmentioning

confidence: 99%

Contamination of the Freshwater Ecosystem by Pesticides

Cope¹

1966

The Journal of Applied Ecology

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“…During 1969 and 1970 Cyanamid Emulsifiable Concentrate 4E was used but during the 1970 programme Abate in wettable powder form was also tested. The powder com- DDT prepared in aliimilar particulate form 13 or adsorbed onto particulates in suspension 14 have earlier been used to remove blackfly larvae from streams without affecting other populations of invertebrates.…”

Section: Introductionmentioning

confidence: 99%

Effect of particulate Abate insecticide on invertebrate stream drift communities in Newfoundland

Frost¹,

Sinniah²

1982

International Journal of Environmental Studies

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A particulate formulation of Abate was used to control blackfly (Diptera: Simuliidae) larvae in Newfoundland. The effects of this compound on stream invertebrates during routine field use was observed by using drift fauna collected in relation to five insecticide treatments using dosage ranging from 0.059-0.091 ppm Abate applied for 18-23 minutes in four different streams. Invertebrate populations varied from stream to stream and the effects of the insecticide on the drift reflect community structure and physical parameters in the stream. Numbers of larvae of Chironomidae (Diptera), Trichoptera, Ephemeroptera and Plecoptera increase in drift after dosing at concentrations of insecticide less than those recommended for Abate when administered as an emulsifiable concentrate. Drifting blackfly larvae increased from five percent up to 40 percent of total drifting communities after the insecticide was applied.

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Adsorption of DDT on Suspended Solids in River Water and its Role in Black-fly Control

Cited by 26 publications

References 1 publication

Effects of dietary esfenvalerate exposures on three aquatic insect species representing different functional feeding groups

Effects of dietary esfenvalerate exposures on three aquatic insect species representing different functional feeding groups

Contamination of the Freshwater Ecosystem by Pesticides

Effect of particulate Abate insecticide on invertebrate stream drift communities in Newfoundland

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