Fate and Effects of the Insecticide Dursban super( registered ) 4E in Indoor Elodea-Dominated and Macrophyte-Free Freshwater Model Ecosystems: I. Fate and Primary Effects of the Active Ingredient Chlorpyrifos

Model freshwater ecosystems were set up in aquariums to simulate conditions in agricultural drainage ditches, receiving single doses of Dursban 4E at a rate equal to 5 or 35 mu g/l chlorpyrifos. One set of aquariums contained the macrophyte Elodea nuttallii and the other set was free of macrophytes....

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Bibliographic Details
Published in:Archives of environmental contamination and toxicology 1992-07, Vol.23 (1), p.69-69
Main Authors: Brock, TCM, Crum, SJH, van Wijngaarden, R, Budde, B J, Tijink, J, Zuppelli, A, Leeuwangh, P
Format: Article
Language:English
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Summary:Model freshwater ecosystems were set up in aquariums to simulate conditions in agricultural drainage ditches, receiving single doses of Dursban 4E at a rate equal to 5 or 35 mu g/l chlorpyrifos. One set of aquariums contained the macrophyte Elodea nuttallii and the other set was free of macrophytes. The effects on several arthropods, including amphipod and isopod crustaceans, and insects were monitored. Adsorption of chlorpyrifos by Elodea and its interference with the insecticide mixing with water were observed. Without the macrophyte, water and insecticide rapidly mixed and were deposited to the sediment. Half the insecticide was gone after 8 d, clearing faster from Elodea and water than from sediment. The effect of chlorpyrifos on microscopic arthropods was delayed by the presence of macrophytes. Cladocerans were more sensitive than copepods. In general, susceptibility of macroscopic arthropods was demonstrated.
ISSN:0090-4341