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Re-evaluation needed for chlorothalonil

Results from a study of the effects of the organochloride fungicide, chlorothalonil, point to the need for a re-evaluation of environmental exposure limits, say researchers from the US Florida University (Tampa). Using artificial ponds, they looked at the effects of the fungicide on freshwater aquatic organisms in such ecosystems. The study found that at ecologically relevant concentrations, chlorothalonil reduced biodiversity, decomposition and water clarity and increased dissolved oxygen and net primary productivity. The result was algal blooms similar to those produced by eutrophication, the researchers note.

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