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Herbicide toxicity to fish-food organisms

1982; Elsevier BV; Volume: 28; Issue: 3 Linguagem: Inglês

10.1016/0143-1471(82)90074-5

1878-0709

Jerin George, H.G. Hingorani, K. S. Rao,

Pesticide and Herbicide Environmental Studies

Abstract The toxic effects of 2,4-D, Dalapon and Tafazine at varying levels on Brachionus calyciflorus, Daphnia lumholtzi, Mesocyclops leuckarti and Heliodiaptomus viduus were investigated. Complete mortality was observed within 31 h among B. calyciflorus exposed to 5·0 ppm 2,4-D. Higher concentrations of 2,4-D were lethal to D. lumholtzi, the entire population dying in 20 ppm concentration at 31 h. No toxic effect was observed in M. leuckarti exposed to 50 ppm, 2,4-D up to 30 days. A lower concentration of Dalapon was found to be lethal to H. viduus, whereas mortality increased in higher concentrations of Tafazine.