Abstract
To assess the effects of pesticides sprayed in golf links on growth of algae population in aquatic environment, toxicity of some pesticides was assayed by 72 hours-algal growth inhibition test. A green algae Selenastrum capricornulum was used for the assay, since it is one of typical algal species in the assay. Of twelve chemicals tested, oxine-copper, butamifos and pendimethalin exhibited a pronounced toxic action on the algae, and reduced the growth of the algae at the concentration below 0.1 mg·l-1. However, with diazinon, trichlorfon, flutoluanil and mecoprop formulation, the concentrations of these chemicals which results in a 50% reduction of growth (EC50) were over 10mg·l-1. The EC50 values of some herbicides and fungicides were lower than the current effluent guide line values for golf links. It suggests that the guide line value should not appropriate for conservation of aquatic ecosystem. It is noticeable that positive correlation was observed between the values of EC50 and water solubility for the chemicals tested.
