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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
environmental science
Acute toxicity of locust insecticides to two indigenous invertebrates from Sahelian temporary ponds
Ecotoxicology and Environmental Safety, Volume 48, No. 1, Year 2001
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Description
During desert locust plagues large amounts of insecticides are used for control operations. Drift from these treatments and accidental overspraying may contaminate small surface waters such as temporary ponds. The present study describes methods for static acute toxicity tests with two abundant organisms that occur in temporary ponds in the African Sahel region: the fairy shrimp Streptocephalus sudanicus Daday (Branchiopoda, Anostraca, Streptocephalidae) and the backswimmer Anisops sardeus Herrich-Schåffer (Hemiptera, Notonectidae). The organisms were captured in the field and 48-h static toxicity tests were conducted in the laboratory. The assays were used to screen the toxicity of 11 formulated synthetic insecticides used in desert locust control and of spores of the mycopesticide Metarhizium anisopliae var. acridum. Most of the synthetic insecticides tested were highly toxic to both organisms (LC50 or EC50 < 1 mg/L). Exceptions were the toxicity of diflubenzuron to A. sardeus (moderately toxic: 1 < LC50 < 10 mg/L), and that of fenitrothion (moderately toxic) and malathion (slightly toxic: 10 < EC50 < 100 mg/L) to S. sudanicus, M. anisopliae var. acridum was moderately toxic to S. sudanicus and only slightly toxic to A. sardeus. EC50 values of the insecticides for S. sudanicus were not significantly correlated with L(E)C50 values for Daphnia magna collected from the literature. For A. sardeus a significant correlation with D. magna was found, but even in this data set the two species had widely differing sensitivities to some insecticides. © 2001 Academic Press.
Authors & Co-Authors
Lahr, Joost
Senegal, Dakar
Food and Agriculture Organization of the United Nations
Badji, Aliou
Unknown Affiliation
Marquenie, Simone
Unknown Affiliation
Schuiling, Egbertha
Unknown Affiliation
Ndour, Khalifa B.
Unknown Affiliation
Diallo, Alpha Oumar
Unknown Affiliation
Everts, J. W.
Senegal, Dakar
Food and Agriculture Organization of the United Nations
Statistics
Citations: 38
Authors: 7
Affiliations: 1
Identifiers
Doi:
10.1006/eesa.2000.1995
ISSN:
01476513
Research Areas
Environmental