Effects of pyridaphenthion on growth of five freshwater species of phytoplankton. A laboratory study

• Published in: Chemosphere (Oxford) Vol. 44; no. 8; pp. 1775 - 1781
• Main Authors: Sabater, Consuelo, Carrasco, José M.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.09.2001; Elsevier
• Subjects: Algae; Animal, plant and microbial ecology; Applied ecology; Biological and medical sciences; Chlorella saccharophila; Chlorella vulgaris; Cyanobacteria; Dose-Response Relationship, Drug; Ecotoxicology, biological effects of pollution; Effects of pollution and side effects of pesticides on plants and fungi; Freshwater; Fundamental and applied biological sciences. Psychology; Insecticide; Insecticides - toxicity; Lethal Dose 50; Organothiophosphorus Compounds - toxicity; Phytoplankton - drug effects; Population Dynamics; Pseudanabaena galeata; Scenedesmus acutus; Scenedesmus subspicatus; Toxicity; Water Pollutants, Chemical - toxicity; Insecticide; Toxicity; Algae; Cyanobacteria; Laboratory study; Ecotoxicology; Acute; Chlorella vulgaris; Pesticides; Scenedesmus; Chlorophyceae; Freshwater environment; Phytotoxicity; Chlorophyta; Bacteria; Phytoplankton; Organophosphorus compounds; Thallophyta
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/S0045-6535(00)00575-0

The acute toxicity of the insecticide and acaricide pyridaphenthion to five species of freshwater phytoplankton, Scenedesmus acutus, Scenedesmus subspicatus, Chlorella vulgaris, Chlorella saccharophila and Pseudanabaena galeata was determined. Insecticide concentrations eliciting a 50% growth reduction over 96 h (EC 50) ranged from 2.2 to 30.9 mg/l. The two species of Chlorella and the cyanobacteria P. galeata were more tolerant than the two species of Scenedesmus. Concentrations of pyridaphenthion detected in some natural waters were less than the toxic threshold for these species.