California farmers who spray a widely used insecticide on some of the state's most abundant crops may soon have to overcome the nation's steepest restrictions of find another pest killer, officials said Thursday.

 

Regulators are proposing heavy restrictions - but not an all out ban - on chlorpyrifos, used to treat crops like grapes and almonds.  The pesticide, in use since 1965, has sickened dozens of farmworks in recent years.  Traces have been found in waterways, threating fish, and regulators say overuse coud make targeted insects immune to the pesticide.

 

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