French health and safety agency ANSES on Wednesday ordered a halt to some uses of one of the most widely used weedkillers in France, S-metolachlor, which is produced by Swiss chemicals company Syngenta, after finding excessive levels in groundwater. Residue of S-metolachlor, used mainly on maize (corn), sunflower, soy, and beet crops, were frequently detected at concentrations exceeding quality limits set by European legislation, ANSES said.
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