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Effects of the organotin acaricide azocyclotin were studied in freshwater microcosms. Run-off conditions were simulated by applying the substance as soil slurry to nominal concentrations of 5, 15, 35, 135 and 405 μg/L, respectively. Plankton and benthon as well as physico-chemical water parameters were analysed regularly for effects over a period of 7 months.Zooplankton was affected at nominal concentrations...
In the present investigation the effect of the herbicide isoproturon on freshwater and sediment organisms was comparatively investigated in single species tests and a microcosm study. In single species tests the photosynthesis inhibitor isoproturon affected the growth rate of algae. For Chlamydomonas rheinhardi the EC50, i.e. the concentration, where the growth rate is inhibited to 50 %, was observed...
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