Crop insecticide linked to low IQ

US researchers have linked a widely used agricultural insecticide to lower IQs in seven-year-olds. The chemical is used on fruit and vegetable crops

Chlorpyrifos, a widely used organophosphate insecticide, has been linked to reduced IQs in a study of US children.1 Those exposed to highest levels in the womb had reduced IQ at age seven.

Organophosphate pesticides have long been the subject of controversy. Their chemical structure is similar to nerve gases such as sarin. And organophosphate sheep dips have attracted particular attention over health effects on farmers in the UK (ENDS Report 420, pp 7-8).

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