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California cuts urban pyrethroid use

The US California EPA’s Department of Pesticide Regulation (DPR) has introduced restrictions on the use of 17 pyrethroid insecticides in structural pest control. The regulations were prompted by the continued detection of pyrethroids in urban waterways at levels toxic to some aquatic organisms, the DPR points out. They are aimed at limiting the amount of pesticides applied outdoors, especially to concrete and other hard surfaces susceptible to run-off. The rules allow spot and pin-stream treatments, but broadcast applications must not be made within 2 ft (0.6 m) of impervious surfaces. They prohibit spraying during rainfall and applications to gutters and drains.

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