Select areas of Lake Zoar will be chemically treated with Diquat herbicide today.  The effort is targeting aquatic nuisance plants like Eurasian watermilfoil and curlyleaf pondweed.  Printed signs have been posted in shoreline areas impacted by the treatment.  Newtown officials say there will be some water use restrictions in the area.  While there are no limits on swimming, boating or fishing, the treated areas of the lake can not be used for drinking purposes for 3 days.  Water for animal consumption is banned for 1 day.  There is no use of treated lake water for irrigating turf or ornamentals for 3 days, or for irrigating food crops for 5 days.